/* style.css — Trust After Trauma Design System & Components */

/* ========================================
   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);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 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;

  /* 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);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

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

  /* Fonts */
  --font-display: 'Zodiak', 'Georgia', serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

/* ========================================
   LIGHT MODE (Default)
   ======================================== */
:root, [data-theme="light"] {
  --color-bg: #FAF8F5;
  --color-surface: #FDFCFA;
  --color-surface-2: #F5F2ED;
  --color-border: oklch(from #2D2B26 l c h / 0.12);
  --color-text: #2D2B26;
  --color-text-muted: #8A8780;
  --color-text-faint: #B8B5B0;
  --color-primary: #5A8A6A;
  --color-primary-hover: #4A7559;
  --color-secondary: #C4836A;
  --color-secondary-hover: #A86E57;

  --shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
}

/* ========================================
   DARK MODE
   ======================================== */
[data-theme="dark"] {
  --color-bg: #1A1917;
  --color-surface: #1E1D1B;
  --color-surface-2: #252422;
  --color-border: oklch(from #E0DEDA l c h / 0.12);
  --color-text: #E0DEDA;
  --color-text-muted: #7A7875;
  --color-text-faint: #555350;
  --color-primary: #7AAF8A;
  --color-primary-hover: #6A9F7A;
  --color-secondary: #D4A38E;
  --color-secondary-hover: #C4937E;

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

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #1A1917;
    --color-surface: #1E1D1B;
    --color-surface-2: #252422;
    --color-border: oklch(from #E0DEDA l c h / 0.12);
    --color-text: #E0DEDA;
    --color-text-muted: #7A7875;
    --color-text-faint: #555350;
    --color-primary: #7AAF8A;
    --color-primary-hover: #6A9F7A;
    --color-secondary: #D4A38E;
    --color-secondary-hover: #C4937E;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

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

a {
  color: var(--color-primary);
  text-decoration-color: transparent;
  text-underline-offset: 0.2em;
  transition: color var(--transition-interactive),
              text-decoration-color var(--transition-interactive);
}
a:hover {
  color: var(--color-primary-hover);
  text-decoration-color: var(--color-primary-hover);
}

/* ========================================
   CONTAINER
   ======================================== */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.container--narrow {
  max-width: var(--content-narrow);
}
.container--default {
  max-width: var(--content-default);
}

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

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: transform 0.3s var(--ease-out),
              box-shadow 0.3s var(--ease-out);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}

@media (min-width: 768px) {
  .header__inner { height: 4rem; }
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.header__nav {
  display: none;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 768px) {
  .header__nav { display: flex; }
}

.header__nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-interactive);
}
.header__nav a:hover {
  color: var(--color-text);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.mobile-menu-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .mobile-menu-btn { display: none; }
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: 3.5rem;
  z-index: 49;
  background: var(--color-bg);
  padding: var(--space-6) var(--space-4);
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-nav--open {
  display: flex;
}

.mobile-nav a {
  font-size: var(--text-base);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

[data-theme="dark"] .hero__bg img {
  opacity: 0.2;
  filter: brightness(0.7);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    oklch(from var(--color-bg) l c h / 0.3) 0%,
    oklch(from var(--color-bg) l c h / 0.6) 40%,
    oklch(from var(--color-bg) l c h / 0.85) 75%,
    var(--color-bg) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding-block: var(--space-24) var(--space-16);
}

.hero__headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.hero__subheadline {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 540px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

.btn--secondary {
  background: var(--color-secondary);
  color: #fff;
}
.btn--secondary:hover {
  background: var(--color-secondary-hover);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn--outline:hover {
  background: oklch(from var(--color-primary) l c h / 0.08);
  color: var(--color-primary);
}

/* ========================================
   SECTIONS — Common
   ======================================== */

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.section__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
}

/* ========================================
   UNDERSTANDING SECTION
   ======================================== */

.understanding {
  background: var(--color-surface);
}

.understanding__grid {
  display: grid;
  gap: var(--space-10);
  align-items: start;
}

@media (min-width: 768px) {
  .understanding__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-12);
  }
}

.understanding__text {
  order: 1;
}

.understanding__description {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.understanding__image {
  order: 2;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
}

@media (max-width: 767px) {
  .understanding__image { order: 0; }
}

.understanding__image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
}

/* Symptom cards — staggered layout */
.symptoms {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

@media (min-width: 480px) {
  .symptoms {
    grid-template-columns: 1fr 1fr;
  }
  .symptoms > :nth-child(2) {
    margin-top: var(--space-6);
  }
  .symptoms > :nth-child(4) {
    margin-top: var(--space-6);
  }
}

.symptom-card {
  background: var(--color-bg);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.symptom-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.symptom-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.understanding__affirmation {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-primary);
  font-style: italic;
}

/* ========================================
   FIRST STEPS SECTION
   ======================================== */

.first-steps__principles {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .first-steps__principles {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6) var(--space-10);
  }
}

.principle {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.principle__number {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-secondary);
  opacity: 0.6;
  line-height: 1;
  min-width: 2.5rem;
}

.principle__content {
  flex: 1;
}

.principle__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.principle__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   ARTICLES SECTION
   ======================================== */

.articles {
  background: var(--color-surface);
}

.articles__grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

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

@media (min-width: 900px) {
  .articles__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  /* Feature the first card spanning 2 cols */
  .articles__grid .article-card:first-child {
    grid-column: 1 / 3;
  }
}

.article-card {
  display: block;
  padding: var(--space-6);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  color: var(--color-text);
}
.article-card:active {
  transform: translateY(0);
}

.article-card__tag {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.article-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.article-card:first-child .article-card__title {
  font-size: var(--text-lg);
}

.article-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.article-card__read {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--space-3);
}

/* ========================================
   FREE GUIDE CTA
   ======================================== */

.free-guide {
  background: var(--color-surface-2);
}

.free-guide__inner {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .free-guide__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.free-guide__content {
  text-align: left;
}

.free-guide__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.free-guide__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.free-guide__list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.free-guide__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.5;
}

.free-guide__list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  margin-top: 0.5em;
}

.free-guide__mockup {
  display: flex;
  justify-content: center;
}

.guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  max-width: 320px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.guide-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  color: var(--color-primary);
}

.guide-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.guide-card__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.guide-card__pages {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* ========================================
   NEWSLETTER SECTION
   ======================================== */

.newsletter {
  text-align: left;
}

.newsletter__form {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
  max-width: 480px;
}

@media (max-width: 480px) {
  .newsletter__form {
    flex-direction: column;
  }
}

.newsletter__input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

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

.newsletter__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.12);
}

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

.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12) var(--space-8);
}

.footer__grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--space-10);
  }
}

.footer__crisis {
  padding: var(--space-5);
  background: oklch(from var(--color-secondary) l c h / 0.08);
  border-radius: var(--radius-lg);
  border: 1px solid oklch(from var(--color-secondary) l c h / 0.15);
}

.footer__crisis-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}

.footer__crisis-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__crisis-list li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.footer__crisis-list a {
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}
.footer__crisis-list a:hover {
  color: var(--color-primary);
}

.footer__col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.footer__links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer__links a:hover {
  color: var(--color-text);
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__credential {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-style: italic;
}

.footer__attribution {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__attribution a {
  color: var(--color-text-faint);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.footer__attribution a:hover {
  color: var(--color-text-muted);
}

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

.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

.reveal-up {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .reveal-up {
    clip-path: inset(100% 0 0 0);
    animation: reveal-clip linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-clip {
  to { clip-path: inset(0 0 0 0); }
}

/* Fallback: JS-based IntersectionObserver animation */
.js-reveal {
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}
.js-reveal.is-visible {
  opacity: 1;
}

/* ========================================
   DECORATIVE ELEMENTS
   ======================================== */

.divider-line {
  width: 60px;
  height: 2px;
  background: var(--color-primary);
  opacity: 0.4;
  margin-bottom: var(--space-6);
}

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

@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 768px) {
  .hide-desktop { display: none !important; }
}