/* ============================================================
   BASE — PsychFLOW Marketing Site
   ============================================================ */

/* 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,    7rem);

  /* 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-2xl:  1.5rem;
  --radius-full: 9999px;

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

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

  /* ---- LIGHT MODE ---- */
  /* PsychFLOW brand palette: deep teal + warm slate */
  --color-bg:               #f4f6f8;
  --color-surface:          #ffffff;
  --color-surface-2:        #f8f9fb;
  --color-surface-offset:   #edf0f4;
  --color-border:           #d4d9e0;
  --color-divider:          #dde1e8;

  --color-text:             #141c26;
  --color-text-muted:       #5a6472;
  --color-text-faint:       #9aa3ae;
  --color-text-inverse:     #f4f6f8;

  /* Brand primary: deep teal/navy */
  --color-primary:          #0d5c7a;
  --color-primary-hover:    #094d68;
  --color-primary-active:   #063c52;
  --color-primary-light:    #e0eff5;

  /* Accent: warm coral — used sparingly for CTAs */
  --color-accent:           #e05a3a;
  --color-accent-hover:     #c94b2d;
  --color-accent-light:     #fdeee9;

  /* App colours (used in timeline & app cards) */
  --color-app-clinic:       #0d5c7a;
  --color-app-logbook:      #1a7a5e;
  --color-app-mentor:       #5b3d8a;
  --color-app-lens:         #b04a20;
  --color-app-supervisor:   #7a5c1a;
  --color-app-internship:   #1a5e7a;
  --color-app-jobboard:     #7a1a2e;
  --color-app-emptychair:   #2a5a1a;
  --color-app-npe:          #3a1a7a;
  --color-app-vault:        #7a1a5a;
  --color-app-townsquare:   #7a5c00;
  --color-app-pioneer:      #005c3a;
  --color-app-whiteglove:   #1a3a6a;
  --color-app-mastery:      #cc5500;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(20,28,38,0.07);
  --shadow-md: 0 4px 16px rgba(20,28,38,0.09);
  --shadow-lg: 0 12px 40px rgba(20,28,38,0.12);

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body:    'General Sans', 'Helvetica Neue', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
}

/* DARK MODE */
[data-theme='dark'] {
  --color-bg:               #0e1420;
  --color-surface:          #141c2a;
  --color-surface-2:        #1a2234;
  --color-surface-offset:   #111827;
  --color-border:           #263040;
  --color-divider:          #1e2a3a;
  --color-text:             #d0d8e4;
  --color-text-muted:       #7a8898;
  --color-text-faint:       #4a5568;
  --color-text-inverse:     #0e1420;
  --color-primary:          #4a9fbd;
  --color-primary-hover:    #5eb5d0;
  --color-primary-active:   #3a8fab;
  --color-primary-light:    #0d2535;
  --color-accent:           #f07050;
  --color-accent-hover:     #ff8060;
  --color-accent-light:     #2a1510;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #0e1420;
    --color-surface:          #141c2a;
    --color-surface-2:        #1a2234;
    --color-surface-offset:   #111827;
    --color-border:           #263040;
    --color-divider:          #1e2a3a;
    --color-text:             #d0d8e4;
    --color-text-muted:       #7a8898;
    --color-text-faint:       #4a5568;
    --color-text-inverse:     #0e1420;
    --color-primary:          #4a9fbd;
    --color-primary-hover:    #5eb5d0;
    --color-primary-active:   #3a8fab;
    --color-primary-light:    #0d2535;
    --color-accent:           #f07050;
    --color-accent-hover:     #ff8060;
    --color-accent-light:     #2a1510;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  }
}

/* ============================================================
   BASE RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

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

img, picture, svg { display: block; max-width: 100%; height: auto; }
ul[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; font-family: var(--font-display); }
p, li { text-wrap: pretty; max-width: 70ch; }
button { cursor: pointer; background: none; border: none; }

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

::selection {
  background: oklch(from var(--color-primary) l c h / 0.2);
  color: var(--color-text);
}

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

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.container--narrow { max-width: var(--content-default); }
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
.section--sm { padding-block: clamp(var(--space-10), 5vw, var(--space-20)); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}
.nav--scrolled { box-shadow: var(--shadow-sm); }

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: 64px;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}
.nav__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.nav__logo-text span { color: var(--color-primary); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin-left: auto;
}

.nav__links a {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition), background var(--transition);
}
.nav__links a:hover { color: var(--color-text); background: var(--color-surface-offset); }
.nav__links a.active { color: var(--color-primary); background: var(--color-primary-light); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: var(--space-4);
}

.nav__menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  margin-left: auto;
}
.nav__menu-toggle:hover { background: var(--color-surface-offset); color: var(--color-text); }

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__menu-toggle { display: flex; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-2);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .nav__links.open a { padding: var(--space-3) var(--space-4); }
  .nav__actions { margin-left: auto; }
  .nav__actions .btn--ghost { display: none; }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 500;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn--primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); transform: translateY(-1px); box-shadow: 0 4px 12px oklch(from var(--color-primary) l c h / 0.3); }
.btn--accent {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--accent:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px oklch(from var(--color-accent) l c h / 0.3); }
.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}
.btn--ghost:hover { background: var(--color-surface-offset); color: var(--color-text); border-color: var(--color-text-faint); }
.btn--outline-primary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline-primary:hover { background: var(--color-primary-light); }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }
.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }

/* ============================================================
   BADGE / PILL
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.badge--primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge--accent  { background: var(--color-accent-light);  color: var(--color-accent); }
.badge--live    { background: #d4edda; color: #1a7a3a; }
.badge--live::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #1a7a3a;
  animation: pulse 2s ease-in-out infinite;
}
.badge--soon   { background: var(--color-surface-offset); color: var(--color-text-muted); }
.badge--phase2 { background: #f0f0ff; color: #5b3d8a; }
[data-theme='dark'] .badge--live    { background: #0d2e1a; color: #4daa70; }
[data-theme='dark'] .badge--live::before { background: #4daa70; }
[data-theme='dark'] .badge--phase2  { background: #1a1030; color: #9a7ad0; }

@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.8); }
}

/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.theme-toggle:hover { background: var(--color-surface-offset); color: var(--color-text); }

/* ============================================================
   APP ICON
   ============================================================ */
.app-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border-radius: var(--radius-xl);
  flex-shrink: 0;
  font-size: 22px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
  margin-top: var(--space-16);
}
.footer__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-8);
}
.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}
.footer__logo span { color: var(--color-primary); }
.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}
.footer__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}
.footer__links a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--color-text-muted); }

@media (max-width: 600px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__links { flex-wrap: wrap; gap: var(--space-4); }
}

/* ============================================================
   APP PAGE HERO
   ============================================================ */
.app-hero {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  border-bottom: 1px solid var(--color-divider);
}
.app-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.app-hero__title {
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}
.app-hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-8);
  line-height: 1.5;
}
.app-hero__actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* ============================================================
   FEATURE GRID
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-10);
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-card__icon {
  font-size: 28px;
  margin-bottom: var(--space-4);
}
.feature-card__title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  font-family: var(--font-body);
}
.feature-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   SECTION HEADING
   ============================================================ */
.section-heading {
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  font-weight: 400;
}
.section-subheading {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-10);
}

/* ============================================================
   BACK LINK
   ============================================================ */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-8);
  transition: color var(--transition);
}
.back-link:hover { color: var(--color-primary); }

/* ============================================================
   APP COLOUR THEMING (accent strips per app page)
   ============================================================ */
.app-accent-strip {
  width: 100%;
  height: 4px;
  background: var(--app-color);
}