/* ============================================================
   NutritionOS — style.css
   ============================================================ */

/* --- CSS Variables (Dark theme defaults) ------------------- */
:root {
  --bg:          #08081A;
  --bg2:         #0E0E26;
  --card:        #12122A;
  --card2:       #17173A;
  --border:      #26264A;
  --border2:     #33335A;
  --primary:     #6C63FF;
  --primary-h:   #5A52E0;
  --primary-g:   rgba(108,99,255,.15);
  --violet-lt:   #A78BFA;
  --text-1:      #FFFFFF;
  --text-2:      #B8B9D0;
  --text-3:      #6B6B8A;
  --success:     #34D399;
  --error:       #F87171;
  --macro-p:     #6C63FF;
  --macro-c:     #F97316;
  --macro-f:     #F59E0B;
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --shadow:      0 4px 32px rgba(0,0,0,.5);
  --shadow-glow: 0 0 48px rgba(108,99,255,.22);
  --transition:  all .2s cubic-bezier(.4,0,.2,1);
  --font:        'Inter', system-ui, sans-serif;
}

/* --- Light Theme ------------------------------------------- */
[data-theme="light"] {
  --bg:          #F4F3FF;
  --bg2:         #ECEAFF;
  --card:        #FFFFFF;
  --card2:       #F9F8FF;
  --border:      #E2DFFA;
  --border2:     #CAC7EF;
  --primary-g:   rgba(108,99,255,.08);
  --text-1:      #18163A;
  --text-2:      #48456C;
  --text-3:      #8885A8;
  --shadow:      0 4px 24px rgba(108,99,255,.1);
  --shadow-glow: 0 0 32px rgba(108,99,255,.12);
}

/* --- Reset + Base ------------------------------------------ */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s ease, color .35s ease;
  overflow-x: hidden;
}
img { display:block; max-width:100%; }
a   { color:inherit; text-decoration:none; }
ul  { list-style:none; }
input,button,select { font-family:inherit; }

/* --- Typography -------------------------------------------- */
h1 { font-size: clamp(2rem, 5vw, 3.6rem); font-weight:800; line-height:1.1; letter-spacing:-.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); font-weight:700; line-height:1.2; letter-spacing:-.01em; }
h3 { font-size: 1.1rem; font-weight:600; }
p  { color: var(--text-2); line-height:1.75; }

.gradient-text {
  background: linear-gradient(135deg, #fff 0%, var(--violet-lt) 50%, var(--primary) 100%);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
[data-theme="light"] .gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--violet-lt) 60%, #9333EA 100%);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}

/* --- Shared Buttons ---------------------------------------- */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 24px; border-radius:var(--radius-sm); font-size:15px; font-weight:600;
  cursor:pointer; border:none; transition:var(--transition); white-space:nowrap;
}
.btn-primary { background:var(--primary); color:#fff; box-shadow:0 4px 20px rgba(108,99,255,.4); }
.btn-primary:hover { background:var(--primary-h); transform:translateY(-1px); box-shadow:0 8px 28px rgba(108,99,255,.5); }
.btn-outline { background:transparent; color:var(--text-1); border:1.5px solid var(--border2); }
.btn-outline:hover { border-color:var(--primary); color:var(--violet-lt); background:var(--primary-g); }
.btn-ghost { background:transparent; color:var(--text-2); border:1.5px solid var(--border); }
.btn-ghost:hover { background:var(--card2); color:var(--text-1); }
.btn:disabled { opacity:.35; cursor:not-allowed; transform:none !important; box-shadow:none !important; }
.btn-lg { padding:15px 32px; font-size:16px; }

/* --- Badge ------------------------------------------------- */
.badge {
  display:inline-flex; align-items:center; gap:6px;
  background:var(--primary-g); border:1px solid rgba(108,99,255,.3);
  color:var(--violet-lt); border-radius:99px; padding:5px 14px;
  font-size:12px; font-weight:500; letter-spacing:.01em;
}

/* ============================================================
   NAVIGATION (shared)
   ============================================================ */
.site-nav {
  position:fixed; top:0; left:0; right:0; z-index:200;
  height:64px; display:flex; align-items:center; padding:0 5%;
  background:rgba(8,8,26,.88);
  backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
  transition:background .35s ease, border-color .35s ease;
}
[data-theme="light"] .site-nav {
  background:rgba(244,243,255,.92);
}
.nav-inner {
  display:flex; align-items:center; justify-content:space-between;
  width:100%; max-width:1200px; margin:0 auto; padding:0 32px; gap:16px;
}
.nav-logo {
  display:flex; align-items:center; gap:9px;
  font-size:17px; font-weight:700; letter-spacing:-.3px; flex-shrink:0;
}
.logo-icon {
  width:34px; height:34px;
  background:linear-gradient(135deg,var(--primary),var(--violet-lt));
  border-radius:9px; display:flex; align-items:center; justify-content:center;
  font-size:17px; flex-shrink:0;
}
.nav-links { display:flex; gap:28px; flex:1; justify-content:center; }
.nav-links a { font-size:14px; font-weight:500; color:var(--text-2); transition:var(--transition); }
.nav-links a:hover { color:var(--text-1); }
.nav-right { display:flex; align-items:center; gap:10px; }

/* Language Switcher */
.lang-switcher { position:relative; }
.lang-trigger {
  display:flex; align-items:center; gap:5px; cursor:pointer;
  padding:7px 11px; background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-sm); font-size:13px; font-weight:500; color:var(--text-2);
  transition:var(--transition); white-space:nowrap;
}
.lang-trigger:hover { border-color:var(--border2); color:var(--text-1); }
.lang-trigger .ti { font-size:14px; color:var(--text-3); }
.lang-menu {
  position:absolute; top:calc(100% + 8px); right:0;
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:4px; min-width:152px;
  box-shadow:var(--shadow); z-index:500;
  opacity:0; pointer-events:none; transform:translateY(-8px);
  transition:opacity .2s ease, transform .2s ease;
}
.lang-menu.open { opacity:1; pointer-events:all; transform:translateY(0); }
.lang-option {
  display:flex; align-items:center; gap:10px; padding:8px 12px;
  border-radius:6px; font-size:13px; font-weight:500; color:var(--text-2);
  cursor:pointer; transition:var(--transition);
}
.lang-option:hover { background:var(--bg2); color:var(--text-1); }
.lang-option.active { color:var(--primary); background:var(--primary-g); }

/* Theme Button */
.theme-btn {
  width:36px; height:36px; border-radius:var(--radius-sm);
  border:1px solid var(--border); background:var(--card);
  color:var(--text-2); cursor:pointer; display:flex;
  align-items:center; justify-content:center; font-size:17px;
  transition:var(--transition); flex-shrink:0;
}
.theme-btn:hover { border-color:var(--border2); color:var(--text-1); }

/* Mobile hamburger */
.hamburger {
  display:none; flex-direction:column; gap:5px; cursor:pointer;
  padding:4px; border:none; background:none;
}
.hamburger span {
  display:block; width:22px; height:2px; background:var(--text-2);
  border-radius:2px; transition:var(--transition);
}
.mobile-menu {
  display:none; position:fixed; top:64px; left:0; right:0;
  background:var(--bg); border-bottom:1px solid var(--border);
  padding:20px 5%; z-index:199; flex-direction:column; gap:4px;
  backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
}
.mobile-menu.open { display:flex; }
.mobile-menu a {
  font-size:15px; font-weight:500; color:var(--text-2);
  padding:12px 0; border-bottom:1px solid var(--border); display:block;
  transition:var(--transition);
}
.mobile-menu a:hover { color:var(--text-1); }
.mobile-menu a:last-child { border:none; }
.mobile-menu .btn { align-self:center; justify-content:center; margin-top:12px; }

/* Calc nav back link */
.nav-back {
  display:flex; align-items:center; gap:7px;
  font-size:14px; font-weight:500; color:var(--text-2); transition:var(--transition);
}
.nav-back:hover { color:var(--text-1); }

/* ============================================================
   LANDING PAGE
   ============================================================ */

/* Hero */
.hero-section {
  min-height:100vh; display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  text-align:center; padding:100px 5% 80px; position:relative; overflow:hidden;
}
.hero-bg {
  position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(ellipse 80% 55% at 50% -5%, rgba(108,99,255,.22) 0%, transparent 60%),
    radial-gradient(ellipse 35% 35% at 85% 65%, rgba(167,139,250,.1) 0%, transparent 55%);
}
.hero-grid {
  position:absolute; inset:0; pointer-events:none;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size:60px 60px; opacity:.1;
}
.hero-content { position:relative; z-index:1; max-width:840px; }
.hero-content .badge { margin-bottom:24px; }
.hero-content h1 { margin-bottom:20px; }
.hero-sub { font-size:clamp(15px,2vw,18px); max-width:560px; margin:0 auto 36px; }
.hero-ctas { display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-bottom:56px; }

/* Preview mockup */
.hero-preview {
  width:100%; max-width:800px; margin:0 auto;
  border-radius:var(--radius-xl); background:var(--card);
  border:1px solid var(--border); overflow:hidden;
  box-shadow:var(--shadow), var(--shadow-glow);
}
.hero-preview::before {
  content:''; display:block; height:36px;
  background:var(--card2); border-bottom:1px solid var(--border);
}
.preview-dots { position:absolute; top:11px; left:16px; display:flex; gap:7px; }
.preview-dots span { width:11px; height:11px; border-radius:50%; }
.preview-dots span:nth-child(1){background:#FF5F57;}
.preview-dots span:nth-child(2){background:#FFBD2E;}
.preview-dots span:nth-child(3){background:#28C840;}
.preview-body {
  padding:24px 28px 28px;
  display:grid; grid-template-columns:repeat(3,1fr); gap:14px;
}
.preview-card {
  background:var(--card2); border:1px solid var(--border);
  border-radius:var(--radius-md); padding:16px;
}
.preview-card .p-label { font-size:10px; color:var(--text-3); text-transform:uppercase; letter-spacing:.08em; margin-bottom:6px; }
.preview-card .p-val   { font-size:24px; font-weight:700; }
.preview-card .p-unit  { font-size:11px; color:var(--text-3); margin-top:2px; }
.preview-bar { height:4px; background:var(--border); border-radius:4px; margin-top:10px; overflow:hidden; }
.preview-bar-fill { height:100%; border-radius:4px; background:linear-gradient(90deg,var(--primary),var(--violet-lt)); }
.hero-preview-wrapper { position:relative; }

/* Section base */
.section { padding:88px 5%; }
.section-inner { max-width:1200px; margin:0 auto; padding:0 32px; width:100%; }
.section-tag { font-size:12px; font-weight:600; letter-spacing:.1em; text-transform:uppercase; color:var(--violet-lt); margin-bottom:14px; }
.section-title { margin-bottom:14px; }
.section-sub { font-size:17px; max-width:520px; margin:0 auto 52px; }
.text-center { text-align:center; }

/* Stats bar */
.stats-section { padding:40px 5%; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.stats-inner {
  max-width:960px; margin:0 auto;
  display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center;
}
.stat-num {
  font-size:2.1rem; font-weight:800;
  background:linear-gradient(135deg,#fff,var(--violet-lt));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
[data-theme="light"] .stat-num {
  background:linear-gradient(135deg,var(--primary),var(--violet-lt));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.stat-label { font-size:13px; color:var(--text-3); margin-top:4px; }

/* Features grid */
.features-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.feature-card {
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:26px; transition:var(--transition);
}
.feature-card:hover { border-color:var(--border2); transform:translateY(-3px); box-shadow:var(--shadow-glow); }
.feature-icon {
  width:46px; height:46px; border-radius:var(--radius-sm);
  display:flex; align-items:center; justify-content:center;
  font-size:22px; margin-bottom:14px;
}
.feature-card h3 { margin-bottom:7px; font-size:15px; }
.feature-card p  { font-size:13.5px; line-height:1.65; }

/* ============================================================
   HOW IT WORKS — Fixed connector line
   ============================================================ */
.steps-section { background:var(--bg2); }
.steps-grid {
  display:grid; grid-template-columns:repeat(3,1fr);
  gap:0; position:relative;
}
/* The horizontal connector line — z-index:0 so circles cover it */
.steps-connector {
  position:absolute;
  top:31px;                   /* center of 64px circle */
  left:calc(100% / 6);       /* right edge of col1 center area */
  right:calc(100% / 6);      /* left edge of col3 center area */
  height:2px;
  background:linear-gradient(90deg, var(--primary), var(--violet-lt), var(--primary));
  opacity:.3; z-index:0;
}
.step-card { text-align:center; padding:0 28px; }
.step-num {
  width:64px; height:64px; border-radius:50%;
  background:var(--bg2);             /* opaque bg covers connector line */
  border:2px solid var(--primary);
  display:flex; align-items:center; justify-content:center;
  font-size:22px; font-weight:800; color:var(--violet-lt);
  margin:0 auto 20px;
  position:relative; z-index:1;     /* above connector line */
  box-shadow:0 0 0 6px var(--bg2); /* extra buffer to fully hide line */
}
[data-theme="light"] .step-num { background:var(--bg2); box-shadow:0 0 0 6px var(--bg2); }
.step-card h3 { margin-bottom:10px; font-size:16px; }
.step-card p  { font-size:14px; color:var(--text-2); line-height:1.65; }

/* Science / Trust */
.science-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:12px; }
.science-card {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius-md);
  padding:16px 20px; display:flex; align-items:flex-start; gap:12px; transition:var(--transition);
}
.science-card:hover { border-color:var(--border2); }
.sci-icon {
  width:36px; height:36px; border-radius:8px;
  background:var(--primary-g); border:1px solid rgba(108,99,255,.3);
  display:flex; align-items:center; justify-content:center;
  font-size:17px; color:var(--violet-lt); flex-shrink:0;
}
.sci-text .label { font-size:13px; font-weight:600; color:var(--text-1); margin-bottom:2px; }
.sci-text .desc  { font-size:12px; color:var(--text-3); line-height:1.5; }

/* Scientific Disclaimer section */
.sci-disclaimer-section { background:var(--bg2); padding:72px 5%; }
.sci-disclaimer-inner { max-width:860px; margin:0 auto; }
.sci-disclaimer-card {
  background:var(--card);
  border:1px solid var(--border);
  border-left:3px solid var(--primary);
  border-radius:var(--radius-md);
  padding:28px 32px;
  margin-bottom:20px;
}
.sci-disclaimer-card h4 { font-size:15px; margin-bottom:10px; color:var(--text-1); }
.sci-disclaimer-card p { font-size:14px; line-height:1.75; }
.sci-refs { display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin-top:8px; }
.sci-ref {
  background:var(--bg2); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:14px 16px;
}
.sci-ref .ref-title { font-size:13px; font-weight:600; color:var(--text-1); margin-bottom:4px; }
.sci-ref .ref-body  { font-size:12px; color:var(--text-3); line-height:1.55; }

/* CTA section */
.cta-section { padding:96px 5%; text-align:center; position:relative; overflow:hidden; }
.cta-bg {
  position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(ellipse 70% 70% at 50% 50%, rgba(108,99,255,.17) 0%, transparent 70%);
}
.cta-box {
  position:relative; background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-xl); padding:72px 5%; max-width:740px; margin:0 auto;
  box-shadow:var(--shadow); overflow:hidden;
}
.cta-box::before {
  content:''; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(ellipse 100% 60% at 50% -20%, rgba(108,99,255,.12) 0%, transparent 60%);
}
.cta-box > * { position:relative; z-index:1; }
.cta-box h2 { margin-bottom:14px; }
.cta-box p  { margin-bottom:28px; font-size:17px; max-width:460px; margin-inline:auto; margin-bottom:28px; }

/* Footer */
footer { padding:80px 5% 48px; border-top:1px solid rgba(255,255,255,0.08); }
[data-theme="light"] footer { border-top:1px solid var(--border); }
.footer-inner { max-width:1200px; margin:0 auto; padding:0 32px; display:flex; flex-direction:column; gap:64px; width:100%; }
.footer-top {
  display:flex; justify-content:space-between; gap:64px; align-items:start;
}
.footer-brand { max-width:280px; }
.footer-brand .nav-logo { margin-bottom:16px; }
.footer-brand p { font-size:14px; color:var(--text-3); line-height:1.6; margin-top:0; }
.footer-links-grid { display:flex; gap:96px; }
.footer-col h4 { font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.1em; color:var(--text-1); margin-bottom:20px; }
.footer-col a {
  display:block; font-size:14px; color:var(--text-3);
  margin-bottom:12px; transition:color .2s ease;
}
.footer-col a:hover { color:var(--violet-lt); }
.footer-bottom {
  padding-top:32px; border-top:1px solid rgba(255,255,255,0.08);
  display:flex; align-items:center; justify-content:space-between;
  font-size:13px; color:var(--text-3);
}
[data-theme="light"] .footer-bottom { border-top:1px solid var(--border); }
.footer-bottom-left { line-height:1; }
.footer-bottom-right { line-height:1; text-align:right; }

/* ============================================================
   MODAL SYSTEM
   ============================================================ */
.modal-overlay {
  position:fixed; inset:0;
  background:rgba(0,0,0,.7); backdrop-filter:blur(10px);
  z-index:1000; display:flex; align-items:center; justify-content:center;
  opacity:0; pointer-events:none; transition:opacity .25s ease; padding:20px;
}
.modal-overlay.open { opacity:1; pointer-events:all; }
.modal-dialog {
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-lg); max-width:680px; width:100%;
  max-height:88vh; overflow:hidden; display:flex; flex-direction:column;
  box-shadow:0 24px 64px rgba(0,0,0,.5); transform:translateY(8px);
  transition:transform .25s ease;
}
.modal-overlay.open .modal-dialog { transform:translateY(0); }
.modal-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 24px; border-bottom:1px solid var(--border); flex-shrink:0;
}
.modal-header h3 { font-size:17px; font-weight:600; }
.modal-close {
  width:32px; height:32px; border-radius:7px; border:1px solid var(--border);
  background:none; color:var(--text-3); cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  font-size:20px; line-height:1; transition:var(--transition);
}
.modal-close:hover { color:var(--text-1); background:var(--bg2); border-color:var(--border2); }
.modal-body {
  padding:24px; overflow-y:auto; font-size:14px;
  line-height:1.75; color:var(--text-2); flex:1;
}
.modal-body h4 { color:var(--text-1); font-size:15px; font-weight:600; margin:22px 0 8px; }
.modal-body h4:first-of-type { margin-top:0; }
.modal-body p   { margin-bottom:12px; }
.modal-body ul  { margin:6px 0 14px 20px; }
.modal-body li  { margin-bottom:7px; list-style:disc; }
.modal-body a   { color:var(--primary); text-decoration:underline; }
.modal-body a:hover { color:var(--violet-lt); }
.modal-date     { font-size:12px; color:var(--text-3); margin-bottom:20px; display:block; }
.modal-ref {
  background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius-sm);
  padding:12px 16px; margin-bottom:10px;
}
.modal-ref .ref-name { font-size:13px; font-weight:600; color:var(--text-1); margin-bottom:4px; }
.modal-ref .ref-cite { font-size:12px; color:var(--text-3); line-height:1.55; }

/* ============================================================
   CALCULATOR PAGE
   ============================================================ */

/* Progress bar */
.calc-progress {
  position:fixed; top:64px; left:0; right:0; z-index:100;
  background:rgba(8,8,26,.92); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border); padding:0 5%;
  transition:background .35s ease;
}
[data-theme="light"] .calc-progress { background:rgba(244,243,255,.94); }
.calc-progress-inner { max-width:800px; margin:0 auto; padding:18px 32px 14px; }

.progress-container {
  display:flex; justify-content:space-between; align-items:flex-start;
  position:relative; width:100%;
}
/* Static track — z-index:0, behind dots */
.progress-track-bg {
  position:absolute; top:16px; left:0; right:0;
  height:2px; background:var(--border); z-index:0;
}
/* Animated fill — z-index:1 */
.progress-track-fill {
  position:absolute; top:16px; left:0;
  height:2px; background:var(--primary);
  z-index:1; width:0%; transition:width .4s cubic-bezier(.4,0,.2,1);
}
.progress-node {
  display:flex; flex-direction:column; align-items:center; gap:8px;
  position:relative; z-index:2;
  width: 80px; /* give nodes fixed width to center nicely over the track */
}
/* Dots — opaque bg to cover the track lines */
.ps-dot {
  width:32px; height:32px; border-radius:50%;
  border:2px solid var(--border);
  background:var(--bg);           /* opaque! covers track line */
  display:flex; align-items:center; justify-content:center;
  font-size:13px; font-weight:600; color:var(--text-3);
  transition:var(--transition); flex-shrink:0;
  box-shadow:0 0 0 4px var(--bg); /* buffer so track line doesn't bleed */
}
[data-theme="light"] .ps-dot { background:var(--bg); box-shadow:0 0 0 4px var(--bg); }
.ps-dot.active { border-color:var(--primary); color:var(--primary); background:var(--primary-g); box-shadow:0 0 0 4px var(--bg); }
.ps-dot.done   { border-color:var(--primary); background:var(--primary); color:#fff; }
[data-theme="light"] .ps-dot.active { background:var(--primary-g); box-shadow:0 0 0 4px var(--bg); }
[data-theme="light"] .ps-dot.done   { box-shadow:0 0 0 4px var(--bg); }

.ps-label  { font-size:11px; color:var(--text-3); text-align:center; transition:var(--transition); white-space:nowrap; }
.ps-label.active { color:var(--violet-lt); font-weight:500; }
.ps-label.done   { color:var(--success); }

/* Calc layout */
.calc-main { min-height:100vh; padding:200px 0 64px; }
.calc-inner { max-width:1200px; margin:0 auto; padding:0 32px; width:100%; }

/* Max widths for steps */
#step-1, #step-2, #step-3 { max-width:620px; margin:0 auto; }

/* Step */
.step { display:none; }
.step.active { display:block; animation:fade-up .35s ease both; }
.step-heading { margin-bottom:40px; }
.step-heading h2 { font-size:clamp(1.5rem,3.5vw,1.9rem); margin-bottom: 12px; }
.step-heading p  { font-size:15px; color:var(--text-2); margin-top:0; }

/* Form card */
.form-card {
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:28px 32px;
  box-shadow:var(--shadow);
}
.form-section-label {
  font-size:11px; text-transform:uppercase; letter-spacing:.08em;
  font-weight:600; color:var(--text-3); margin-bottom:14px;
}
.divider { border:none; border-top:1px solid var(--border); margin:22px 0; }

/* Form row/group */
.form-row { display:flex; gap:16px; }
.form-group { flex:1; display:flex; flex-direction:column; gap:8px; }
label.form-label { font-size:12px; font-weight:500; color:var(--text-3); letter-spacing:.02em; }

/* Toggle (units) */
.unit-toggle {
  display:flex; background:var(--bg2); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:3px;
}
.unit-btn {
  flex:1; text-align:center; padding:9px; border-radius:6px;
  font-size:13px; font-weight:500; color:var(--text-3); cursor:pointer;
  transition:var(--transition); user-select:none;
}
.unit-btn.active { background:var(--primary); color:#fff; }

/* Input */
.form-input {
  height:48px; background:var(--bg2); border:1.5px solid var(--border);
  border-radius:var(--radius-sm); padding:0 14px; font-size:15px; color:var(--text-1);
  outline:none; transition:var(--transition); width:100%;
  -moz-appearance:textfield;
}
.form-input::-webkit-outer-spin-button,
.form-input::-webkit-inner-spin-button { -webkit-appearance:none; }
.form-input:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(108,99,255,.14); }
.form-input.error { border-color:var(--error); }
.form-input::placeholder { color:var(--text-3); }

.form-error { font-size:11px; color:var(--error); display:none; margin-top:2px; }
.form-error.show { display:block; }

/* Sex pills */
.sex-group { display:flex; gap:10px; }
.sex-pill {
  flex:1; padding:12px; text-align:center;
  border:1.5px solid var(--border); border-radius:var(--radius-sm);
  font-size:14px; font-weight:500; color:var(--text-2);
  cursor:pointer; transition:var(--transition); user-select:none;
}
.sex-pill:hover { border-color:var(--border2); color:var(--text-1); }
.sex-pill.active { border-color:var(--primary); background:var(--primary-g); color:var(--violet-lt); }
.sex-pill.error  { border-color:var(--error); }

/* Form nav buttons */
.form-nav { display:flex; gap:12px; margin-top:24px; }
.form-nav .btn { flex:1; justify-content:center; }

/* ============================================================
   ACTIVITY CARDS
   ============================================================ */
.activity-list { display:flex; flex-direction:column; gap:10px; }
.act-card {
  display:flex; align-items:center; gap:16px;
  padding:16px 20px; border:1.5px solid var(--border);
  border-radius:var(--radius-md); cursor:pointer; transition:var(--transition);
  background:var(--card);
}
.act-card:hover { border-color:var(--border2); background:var(--card2); transform:translateX(2px); }
.act-card.active { border-color:var(--primary); background:var(--primary-g); }
.act-icon-wrap {
  width:44px; height:44px; border-radius:var(--radius-sm);
  background:var(--bg2); border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  font-size:20px; color:var(--text-3); flex-shrink:0;
  transition:var(--transition);
}
.act-card.active .act-icon-wrap { background:var(--primary-g); border-color:var(--primary); color:var(--violet-lt); }
.act-info { flex:1; }
.act-title { font-size:14px; font-weight:600; color:var(--text-1); }
.act-desc  { font-size:12.5px; color:var(--text-3); margin-top:2px; line-height:1.5; }
.act-card.active .act-title { color:var(--violet-lt); }

/* ============================================================
   GOAL CARDS
   ============================================================ */
.goal-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-bottom:4px; }
.goal-card {
  padding:20px; border:1.5px solid var(--border); border-radius:var(--radius-md);
  cursor:pointer; transition:var(--transition); background:var(--card); text-align:center;
}
.goal-card:hover { border-color:var(--border2); background:var(--card2); }
.goal-card.full { grid-column:span 2; }
.goal-icon { font-size:26px; margin-bottom:10px; }
.goal-title { font-size:14px; font-weight:600; color:var(--text-1); margin-bottom:4px; }
.goal-desc  { font-size:12px; color:var(--text-3); line-height:1.5; margin-bottom:8px; }
.goal-badge {
  display:inline-block; font-size:11px; font-weight:600;
  padding:3px 10px; border-radius:99px;
}
/* Goal states */
.goal-card[data-type="cut"].active   { border-color:#F87171; background:rgba(248,113,113,.07); }
.goal-card[data-type="cut"].active .goal-title { color:#FDA4AF; }
.goal-card[data-type="cut"] .goal-badge { background:rgba(248,113,113,.1); color:#FDA4AF; }

.goal-card[data-type="recomp"].active { border-color:#38BDF8; background:rgba(56,189,248,.07); }
.goal-card[data-type="recomp"].active .goal-title { color:#7DD3FC; }
.goal-card[data-type="recomp"] .goal-badge { background:rgba(56,189,248,.1); color:#7DD3FC; }

.goal-card[data-type="maintain"].active { border-color:#34D399; background:rgba(52,211,153,.07); }
.goal-card[data-type="maintain"].active .goal-title { color:#6EE7B7; }
.goal-card[data-type="maintain"] .goal-badge { background:rgba(52,211,153,.1); color:#6EE7B7; }

.goal-card[data-type="bulk"].active { border-color:var(--primary); background:var(--primary-g); }
.goal-card[data-type="bulk"].active .goal-title { color:var(--violet-lt); }
.goal-card[data-type="bulk"] .goal-badge { background:rgba(108,99,255,.1); color:var(--violet-lt); }

/* ============================================================
   RESULTS DASHBOARD
   ============================================================ */
.results-header { margin-bottom:32px; text-align:left; }
.results-header h2 { font-size:clamp(1.4rem,3vw,1.75rem); margin-bottom:4px; text-align:left; }
.results-header p  { font-size:14px; color:var(--text-3); text-align:left; }

.dash-stack { display:flex; flex-direction:column; gap:16px; }

.dash-card {
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:24px; box-shadow:var(--shadow);
}
.dash-card h3 { font-size:15px; margin-bottom:4px; }
.dash-card-2col { display:grid; grid-template-columns:1fr 1fr; gap:16px; }

/* Target card */
.target-card {
  background:linear-gradient(135deg,rgba(108,99,255,.18),rgba(167,139,250,.08));
  border-color:rgba(108,99,255,.3) !important; text-align:center;
}
.target-label { font-size:11px; text-transform:uppercase; letter-spacing:.1em; color:var(--violet-lt); font-weight:600; margin-bottom:8px; }
.target-calories { font-size:clamp(3rem,6vw,4rem); font-weight:800; color:var(--text-1); line-height:1; margin-bottom:6px; }
.target-unit { font-size:14px; color:var(--violet-lt); margin-bottom:8px; }
.target-adj {
  display:inline-block; margin-left:6px;
  background:var(--primary-g); color:var(--violet-lt);
  padding:2px 9px; border-radius:99px; font-weight:600; font-size:13px;
}
.target-meta { font-size:12px; color:var(--text-3); }

/* Mini stat */
.mini-stat-label { font-size:11px; text-transform:uppercase; letter-spacing:.06em; color:var(--text-3); margin-bottom:6px; }
.mini-stat-val   { font-size:1.65rem; font-weight:700; color:var(--text-1); }
.mini-stat-unit  { font-size:12px; color:var(--text-3); margin-top:3px; }

/* Macros card */
.macros-split-label { font-size:12px; color:var(--text-3); margin-top:4px; }
.macro-ring-group { display:flex; justify-content:center; gap:32px; margin:24px 0 20px; }
.macro-item { text-align:center; }
.macro-donut { position:relative; width:100px; height:100px; margin:0 auto 10px; }
.macro-donut svg { transform:rotate(-90deg); }
.macro-donut-label {
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  font-size:16px; font-weight:700; color:var(--text-1);
}
.macro-name { font-size:13px; font-weight:500; color:var(--text-2); }
.macro-sub  { font-size:11px; color:var(--text-3); margin-top:3px; }
.protein-per-meal {
  background:var(--bg2); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:11px 16px;
  font-size:13px; font-weight:500; color:var(--text-2); text-align:center;
}

/* Hydration */
.hydration-inner { display:flex; align-items:center; gap:18px; }
.hydration-icon {
  width:54px; height:54px; border-radius:var(--radius-md);
  background:rgba(56,189,248,.1); border:1px solid rgba(56,189,248,.22);
  display:flex; align-items:center; justify-content:center;
  font-size:26px; flex-shrink:0;
}
.hydration-val  { font-size:2rem; font-weight:700; color:var(--text-1); }
.hydration-lbl  { font-size:12px; color:var(--text-3); margin-top:3px; }

/* Tabs */
.tabs {
  display:flex; gap:4px; background:var(--bg2); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:4px; width:fit-content; margin-bottom:16px;
}
.tab-btn {
  padding:7px 15px; font-size:13px; font-weight:500;
  border-radius:6px; cursor:pointer; color:var(--text-3);
  transition:var(--transition); border:none; background:none;
}
.tab-btn.active { background:var(--card2); color:var(--text-1); box-shadow:0 1px 4px rgba(0,0,0,.2); }

/* Table */
.data-table { width:100%; border-collapse:collapse; font-size:13.5px; }
.data-table th {
  text-align:left; padding:9px 0; color:var(--text-3);
  border-bottom:1px solid var(--border); font-weight:500; font-size:12px;
}
.data-table td { padding:10px 0; border-bottom:1px solid rgba(255,255,255,.04); }
.data-table tr:last-child td { border:none; }
.data-table td:last-child { color:var(--violet-lt); font-weight:500; }

/* Budget */
.budget-plan { background:var(--bg2); border-radius:var(--radius-sm); padding:4px 0; }
.budget-item {
  display:flex; align-items:center; gap:10px;
  font-size:13.5px; color:var(--text-2); padding:10px 16px;
  border-bottom:1px solid var(--border);
}
.budget-item:last-child { border:none; }
.budget-item i { color:var(--success); font-size:15px; flex-shrink:0; }

/* Timeline */
.timeline-wrap { padding:0 8px; margin-top:20px; }
.timeline-track { height:2px; background:rgba(108,99,255,.2); border-radius:2px; position:relative; margin:32px 0 28px; }
.tl-dots-row {
  display:flex; justify-content:space-between;
  position:absolute; top:50%; transform:translateY(-50%); width:100%;
}
.tl-dot { display:flex; flex-direction:column; align-items:center; position:relative; }
.tl-circle {
  width:14px; height:14px; border-radius:50%;
  background:var(--primary); border:2px solid var(--bg);
  box-shadow:0 0 0 3px rgba(108,99,255,.28); display:block;
}
.tl-wk { position:absolute; bottom:calc(100% + 9px); font-size:10px; font-weight:600; color:var(--violet-lt); white-space:nowrap; }
.tl-weight { position:absolute; top:calc(100% + 9px); font-size:12px; font-weight:600; color:var(--text-1); white-space:nowrap; }
.tl-rate { font-size:12px; color:var(--text-3); text-align:center; margin-top:48px; }

/* Reco list */
.reco-list { display:flex; flex-direction:column; gap:12px; }
.reco-item { display:flex; align-items:flex-start; gap:12px; font-size:14px; color:var(--text-2); line-height:1.6; }
.reco-item i { color:var(--success); flex-shrink:0; margin-top:2px; font-size:16px; }

/* Disclaimer */
.disclaimer { font-size:11.5px; color:var(--text-3); text-align:center; line-height:1.7; padding:16px 0 4px; }

/* Recalculate */
.recalc-btn { width:100%; justify-content:center; margin-top:12px; }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fade-up {
  from { opacity:0; transform:translateY(20px); }
  to   { opacity:1; transform:translateY(0); }
}
.anim-fade-up { animation:fade-up .6s ease both; }
.anim-delay-1 { animation-delay:.1s; }
.anim-delay-2 { animation-delay:.2s; }
.anim-delay-3 { animation-delay:.3s; }
.reveal { opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity:1; transform:translateY(0); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns:repeat(2,1fr); }
  .footer-top { grid-template-columns:1fr; gap:32px; }
  .footer-links-grid { grid-template-columns:repeat(3,1fr); }
}
@media (max-width: 768px) {
  .nav-links { display:none; }
  .hamburger { display:flex; }
  .nav-right .btn-outline { display:none; }
  .stats-inner { grid-template-columns:repeat(2,1fr); }
  .steps-grid  { grid-template-columns:1fr; gap:36px; }
  .steps-connector { display:none; }
  .science-grid { grid-template-columns:1fr; }
  .sci-refs { grid-template-columns:1fr; }
  .features-grid { grid-template-columns:1fr; }
  .goal-grid { grid-template-columns:1fr; }
  .goal-card.full { grid-column:span 1; }
  .footer-links-grid { grid-template-columns:repeat(2,1fr); }
  .footer-bottom { flex-direction:column; gap:12px; }
  .macro-ring-group { gap:20px; }
  .macro-donut { width:85px; height:85px; }
  .dash-card-2col { grid-template-columns:1fr; }
  .hero-preview { display:none; }
  .preview-body { grid-template-columns:1fr 1fr; }
}
@media (max-width: 480px) {
  .section { padding:64px 5%; }
  .hero-section { padding:90px 4% 56px; }
  .hero-ctas { flex-direction:column; align-items:stretch; }
  .hero-ctas .btn { justify-content:center; }
  .form-row { flex-direction:column; gap:14px; }
  .form-card { padding:22px 20px; }
  .stats-inner { grid-template-columns:1fr 1fr; }
  .cta-box { padding:48px 5%; }
  .lang-trigger .lang-label { display:none; }
  .footer-links-grid { grid-template-columns:1fr; gap:20px; }
  .macro-ring-group { flex-wrap:wrap; justify-content:center; gap:16px; }
  .macro-donut { width:80px; height:80px; }
  .ps-label { font-size:9.5px; }
  .calc-inner { max-width:100%; }
}

/* ============================================================
   SEO FAQ STYLES
   ============================================================ */
.faq-accordion {
  display:flex; flex-direction:column; gap:16px;
}
.faq-item {
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  overflow:hidden; transition:border-color .2s ease;
}
.faq-item:hover { border-color:var(--border-hover); }
.faq-item summary {
  padding:20px 24px; font-weight:600; font-size:15px; cursor:pointer;
  list-style:none; display:flex; justify-content:space-between; align-items:center;
  color:var(--text-1); user-select:none;
}
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after {
  content:'+'; font-size:20px; font-weight:400; color:var(--text-3); transition:transform .3s ease;
}
.faq-item[open] summary::after { transform:rotate(45deg); color:var(--text-1); }
.faq-content {
  padding:0 24px 24px 24px; color:var(--text-2); font-size:14.5px; line-height:1.6;
}
.faq-content p { margin:0; }

/* ============================================================
   MOBILE ENHANCEMENTS (Requested Fixes)
   ============================================================ */
@media (max-width: 768px) {
  /* Prevent horizontal scrolling globally */
  body, html { overflow-x: hidden; width: 100%; max-width: 100%; }

  /* Touch targets and Inputs */
  .form-input { min-height: 48px; box-sizing: border-box; width: 100%; }
  .btn, .tab-btn { min-height: 48px; display: flex; align-items: center; justify-content: center; box-sizing: border-box; }
  .tab-btn { display: inline-flex; }
  
  /* Goal Page / Form Nav Buttons Fix */
  .form-nav { flex-direction: column-reverse; gap: 12px; width: 100%; display: flex; }
  .form-nav .btn { width: 100%; max-width: 100%; margin: 0; }
  
  /* Gender Buttons Alignment */
  .sex-pill { display: flex !important; align-items: center !important; justify-content: center !important; min-height: 48px; width: 100%; padding: 0 !important; }
  .sex-pill span { display: flex; align-items: center; justify-content: center; line-height: 1; }
  .unit-btn { display: flex; align-items: center; justify-content: center; min-height: 44px; }
  
  /* Progress Indicator Scaling & Termination */
  .calc-progress-inner { padding: 16px 4% 12px; }
  .progress-container { gap: 0; display: flex; justify-content: space-between; position: relative; }
  .progress-node { width: 64px; max-width: 64px; flex-shrink: 0; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; z-index: 2; }
  .ps-dot { width: 32px; height: 32px; font-size: 13px; box-shadow: 0 0 0 4px var(--bg); margin-bottom: 4px; }
  .ps-label { font-size: 11px; white-space: normal; line-height: 1.2; padding: 0 4px; text-align: center; word-break: break-word; }
  /* Stop exactly at center of first and last step */
  .progress-track-bg, .progress-track-fill { left: 32px !important; width: calc(100% - 64px) !important; top: 16px; }

  /* Forms and Inputs Layout */
  .form-row { flex-direction: column; gap: 16px; }
  .form-card { padding: 24px 20px; }

  /* Footer Complete Redesign */
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .footer-col[style*="max-width"] { max-width: 100% !important; }
  .footer-links-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-col { display: flex; flex-direction: column; align-items: flex-start; }
  .footer-bottom { flex-direction: column; align-items: flex-start; text-align: left; gap: 12px; }
  .footer-desc { width: 100%; max-width: 100%; }

  /* Sources Section Fix - Strict 1 column */
  #science .dash-card-2col { display: flex !important; flex-direction: column !important; gap: 32px !important; width: 100%; align-items: stretch !important; }
  .science-grid { grid-template-columns: 1fr; width: 100%; }
  .science-card { width: 100%; box-sizing: border-box; }
}

@media (max-width: 480px) {
  /* Mobile Header Redesign */
  .site-nav { padding: 0; }
  .nav-inner { padding: 12px 16px; gap: 8px; }
  .nav-logo { font-size: 15px; gap: 6px; }
  .logo-icon { width: 26px; height: 26px; font-size: 14px; border-radius: 6px; }
  .nav-right { gap: 6px; }
  .theme-btn, .lang-trigger { min-height: 38px; min-width: 38px; padding: 0 8px; font-size: 12px; }
  .lang-trigger .ti { font-size: 13px; }
  
  /* Results Page Header Fix */
  #calcNavBack span { display: none; }
  #calcNavBack { padding: 0; width: 38px; height: 38px; min-width: 38px; display: flex; align-items: center; justify-content: center; border-radius: 50%; margin-left: 4px; }
  #calcNavBack i { margin: 0; font-size: 20px; }

  /* Results Dashboard Stacking */
  .dash-card-2col { grid-template-columns: 1fr; gap: 16px; }
  .dash-card { padding: 20px 16px; }
  .target-calories { font-size: 2.5rem; }
  
  /* Charts and Metrics */
  .macro-ring-group { flex-direction: column; align-items: center; gap: 24px; }
  .macro-donut { width: 100px; height: 100px; }
  .macro-item { width: 100%; max-width: 240px; }

  /* Data Table Responsiveness */
  .data-table th, .data-table td { font-size: 12px; padding: 8px 0; }
  
  /* Micronutrients Table -> Cards */
  #microTable, #microTable tbody, #microTable tr, #microTable td { display: block; width: 100%; }
  #microTable thead { display: none; }
  #microTable tr {
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: var(--radius-sm); margin-bottom: 12px; padding: 12px 16px;
  }
  #microTable td { padding: 3px 0 !important; border: none !important; color: var(--text-2) !important; }
  #microTable td:nth-child(1) { font-weight: 600; font-size: 14px; color: var(--text-1) !important; margin-bottom: 4px; padding-top: 0 !important; }
  #microTable td:nth-child(2)::before { content: "RDA: "; font-weight: 500; color: var(--text-3); }
  #microTable td:nth-child(3)::before { content: "Sources: "; font-weight: 500; color: var(--text-3); }
  #microTable td:nth-child(3) { padding-bottom: 0 !important; }
  
  /* Typography */
  .step-heading h2 { font-size: 1.5rem; }
  .section-title { font-size: 1.8rem; }
  
  /* Spacing */
  .section { padding: 48px 5%; }
  .hero-section { padding: 80px 4% 48px; }
  .activity-list { gap: 12px; }
}