/*
Theme Name: Lucent
Theme URI: https://lucentbioresearch.com
Author: Lucent Bio Research
Description: Peptide research library theme for Lucent Bio Research.
Version: 1.0.0
License: All Rights Reserved
*/

/* ============================
   BASE CSS RESET
   ============================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: oklch(from var(--color-primary) l c h / 0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role="button"], [role="link"], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

/* ============================
   LUCENT DESIGN TOKENS
   ============================ */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Satoshi', 'Helvetica Neue', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ============================
   LIGHT MODE (Default)
   ============================ */
:root, [data-theme="light"] {
  --color-bg:             #fafaf8;
  --color-surface:        #ffffff;
  --color-surface-2:      #f5f5f3;
  --color-surface-offset: #f0efec;
  --color-divider:        #e5e3de;
  --color-border:         #d4d1ca;

  /* Text */
  --color-text:           #1a1a1a;
  --color-text-muted:     #6b6b66;
  --color-text-faint:     #a3a39e;
  --color-text-inverse:   #fafaf8;

  /* Sage Green (brand accent from label) */
  --color-primary:        #7a8c6e;
  --color-primary-hover:  #637556;
  --color-primary-active: #4d5e42;
  --color-primary-light:  #e8ece4;
  --color-primary-subtle: #f2f5ef;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
}

/* ============================
   DARK MODE
   ============================ */
[data-theme="dark"] {
  --color-bg:             #111110;
  --color-surface:        #1a1a18;
  --color-surface-2:      #222220;
  --color-surface-offset: #1e1e1c;
  --color-divider:        #2a2a28;
  --color-border:         #383835;

  --color-text:           #e0e0dc;
  --color-text-muted:     #8a8a85;
  --color-text-faint:     #5a5a57;
  --color-text-inverse:   #111110;

  --color-primary:        #9aad8e;
  --color-primary-hover:  #b0c0a5;
  --color-primary-active: #7a8c6e;
  --color-primary-light:  #252824;
  --color-primary-subtle: #1e201c;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #111110;
    --color-surface:        #1a1a18;
    --color-surface-2:      #222220;
    --color-surface-offset: #1e1e1c;
    --color-divider:        #2a2a28;
    --color-border:         #383835;
    --color-text:           #e0e0dc;
    --color-text-muted:     #8a8a85;
    --color-text-faint:     #5a5a57;
    --color-text-inverse:   #111110;
    --color-primary:        #9aad8e;
    --color-primary-hover:  #b0c0a5;
    --color-primary-active: #7a8c6e;
    --color-primary-light:  #252824;
    --color-primary-subtle: #1e201c;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.4);
  }
}

/* ============================
   GLOBAL STYLES
   ============================ */

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

/* ============================
   HEADER / NAV
   ============================ */

.green-accent-bar {
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
  width: 100%;
  position: relative;
  z-index: 101;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  align-items: center;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

.nav-links a:hover {
  color: var(--color-text);
}

.theme-toggle {
  padding: var(--space-2);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-text);
}

/* ============================
   HERO SECTION
   ============================ */

.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-6);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse, var(--color-primary-light) 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}

.hero-content {
  max-width: var(--content-wide);
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  max-width: 540px;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-weight: 500;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 44ch;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}

.hero-cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.hero-cta svg {
  width: 16px;
  height: 16px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-bottles {
  display: flex;
  gap: var(--space-4);
  align-items: flex-end;
}

.hero-bottle {
  width: 200px;
  height: auto;
  border-radius: 0;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.12));
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-bottle:hover {
  transform: translateY(-8px);
}

.hero-bottle:nth-child(2) {
  width: 220px;
  transform: translateY(-20px);
}

.hero-bottle:nth-child(2):hover {
  transform: translateY(-28px);
}

/* ============================
   GREEN SECTION LINE
   ============================ */

.green-section-line {
  max-width: var(--content-wide);
  margin: 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.4;
}

/* ============================
   SECTION SHARED
   ============================ */

.section-divider {
  width: 64px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-hover));
  margin-bottom: var(--space-6);
  border-radius: 2px;
}

/* ============================
   LIBRARY SECTION
   ============================ */

.library {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
  max-width: var(--content-wide);
  margin: 0 auto;
}

.library-header {
  margin-bottom: var(--space-12);
}

.library-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
}

.library-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
}

/* Search & Filters */

.library-controls {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: var(--space-8);
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 240px;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-faint);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.search-input::placeholder {
  color: var(--color-text-faint);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.filter-pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-pill {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-interactive);
}

.filter-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-pill.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Product Grid */

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              border-color var(--transition-interactive);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.product-card-image {
  width: 120px;
  height: 160px;
  object-fit: contain;
  margin-bottom: var(--space-5);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover .product-card-image {
  transform: scale(1.05);
}

.product-card-category {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.product-card-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: 0.01em;
}

.product-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card-arrow {
  margin-top: auto;
  padding-top: var(--space-4);
  color: var(--color-text-faint);
  transition: color var(--transition-interactive), transform var(--transition-interactive);
}

.product-card:hover .product-card-arrow {
  color: var(--color-primary);
  transform: translateX(4px);
}

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-16) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

/* ============================
   PRODUCT MODAL
   ============================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  transition: all var(--transition-interactive);
  z-index: 10;
}

.modal-close:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.modal-header {
  padding: var(--space-8) var(--space-8) 0;
  display: flex;
  gap: var(--space-8);
  align-items: flex-start;
}

.modal-image {
  width: 140px;
  height: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.modal-header-text {
  flex: 1;
}

.modal-category {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.modal-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.modal-classification {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-sm);
  display: inline-block;
}

.modal-body {
  padding: var(--space-6) var(--space-8) var(--space-8);
}

.modal-section-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
  margin-top: var(--space-6);
}

.modal-section-title:first-child {
  margin-top: 0;
}

.modal-text {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
}

.modal-text.muted {
  color: var(--color-text-muted);
}

.modal-components {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.modal-component-tag {
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
}

.modal-disclaimer {
  margin-top: var(--space-8);
  padding: var(--space-4);
  background: var(--color-surface-2);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.6;
  text-align: center;
}

/* ============================
   FOOTER
   ============================ */

.site-footer {
  border-top: 3px solid var(--color-primary);
  padding: var(--space-8) var(--space-6);
  margin-top: clamp(var(--space-12), 8vw, var(--space-24));
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text);
}

.footer-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-links a:hover {
  color: var(--color-text-muted);
}

.footer-ruo {
  width: 100%;
  text-align: center;
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
}

/* ============================
   RESPONSIVE
   ============================ */

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-description {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-visual {
    order: -1;
  }

  .hero-bottles {
    gap: var(--space-2);
  }

  .hero-bottle {
    width: 130px;
  }

  .hero-bottle:nth-child(2) {
    width: 150px;
  }

  .header-inner {
    padding: var(--space-3) var(--space-4);
  }

  .nav-links {
    gap: var(--space-4);
  }

  .library {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .library-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .search-wrapper {
    max-width: 100%;
  }

  .filter-pills {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch;
  }

  .filter-pill {
    white-space: nowrap;
    flex-shrink: 0;
  }

  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-4);
  }

  .modal-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-6) var(--space-5) 0;
  }

  .modal-body {
    padding: var(--space-5);
  }

  .modal-image {
    width: 110px;
  }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 70vh;
    padding: var(--space-10) var(--space-4);
  }

  .hero-bottle {
    width: 100px;
  }

  .hero-bottle:nth-child(2) {
    width: 120px;
  }
}

/* ============================
   ANIMATIONS
   ============================ */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  opacity: 0;
  animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.fade-up-delay-1 { animation-delay: 0.1s; }
.fade-up-delay-2 { animation-delay: 0.2s; }
.fade-up-delay-3 { animation-delay: 0.3s; }