/* ========================================================================
   SIAC — Swiss Indian Arts Collaborative
   Design: Elegant & Editorial
   Palette: Warm ivory + terracotta + deep indigo
   Typography: Amarna (display) + DM Sans (body)
   ======================================================================== */

/* --- 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: 'Amarna', 'Gill Sans', sans-serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* 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;
}

/* --- Light Mode (default) --- */
:root, [data-theme="light"] {
  --color-bg:             #FAF8F5;
  --color-surface:        #F5F2ED;
  --color-surface-2:      #EFEBE5;
  --color-border:         #DCD6CC;
  --color-divider:        #E5E0D8;

  --color-text:           #1A1714;
  --color-text-muted:     #6B6560;
  --color-text-faint:     #A09A94;

  --color-primary:        #C4693D;
  --color-primary-hover:  #A8532A;
  --color-primary-active: #8D4220;

  --color-secondary:      #2C3E6B;
  --color-secondary-hover:#1E2D52;

  --color-accent-gold:    #B8A07E;

  --shadow-sm: 0 1px 3px rgba(26, 23, 20, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 23, 20, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 23, 20, 0.12);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --color-bg:             #141210;
  --color-surface:        #1C1A17;
  --color-surface-2:      #242220;
  --color-border:         #3A3630;
  --color-divider:        #2E2B27;

  --color-text:           #E8E4DF;
  --color-text-muted:     #9B9590;
  --color-text-faint:     #5E5955;

  --color-primary:        #D98B63;
  --color-primary-hover:  #E5A07A;
  --color-primary-active: #C47A52;

  --color-secondary:      #7B92C4;
  --color-secondary-hover:#96A9D4;

  --color-accent-gold:    #C4AA88;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #141210;
    --color-surface:        #1C1A17;
    --color-surface-2:      #242220;
    --color-border:         #3A3630;
    --color-divider:        #2E2B27;
    --color-text:           #E8E4DF;
    --color-text-muted:     #9B9590;
    --color-text-faint:     #5E5955;
    --color-primary:        #D98B63;
    --color-primary-hover:  #E5A07A;
    --color-primary-active: #C47A52;
    --color-secondary:      #7B92C4;
    --color-secondary-hover:#96A9D4;
    --color-accent-gold:    #C4AA88;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
  }
}

/* --- Logo visibility --- */
.logo-light { display: none; }
.logo-dark  { display: block; }
[data-theme="dark"] .logo-light { display: block; }
[data-theme="dark"] .logo-dark  { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .logo-light { display: block; }
  :root:not([data-theme]) .logo-dark  { display: none; }
}

/* ========================================================================
   HEADER
   ======================================================================== */
.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: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

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

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header-logo img {
  height: 48px;
  width: auto;
}

.header-nav {
  display: flex;
  gap: var(--space-6);
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-interactive);
}
.nav-link:hover { color: var(--color-text); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.mobile-menu-btn {
  display: none;
  color: var(--color-text);
  padding: var(--space-2);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6) var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.mobile-nav.open { display: flex; }
.mobile-nav-link {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-2) 0;
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .btn-sm { display: none; }
}

/* ========================================================================
   BUTTONS
   ======================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
}

.btn-sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
}

.btn-hero {
  background: #fff;
  color: #1A1714;
  font-size: var(--text-sm);
  padding: var(--space-4) var(--space-10);
  letter-spacing: 0.08em;
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}
.btn-hero:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0,0,0,0.25);
}
.btn-hero:active {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

/* ========================================================================
   HERO
   ======================================================================== */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(20, 18, 16, 0.25) 0%,
    rgba(20, 18, 16, 0.50) 50%,
    rgba(20, 18, 16, 0.70) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: var(--space-8) var(--space-6);
  color: #fff;
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  line-height: 1.15;
  margin-bottom: var(--space-6);
  color: #fff;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-2);
}

.hero-date {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-8);
  letter-spacing: 0.04em;
}

/* ========================================================================
   SECTIONS
   ======================================================================== */
.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  max-width: 600px;
}

.section-divider {
  display: flex;
  justify-content: center;
  padding: 0 var(--space-6);
}
.divider-line {
  width: 100%;
  max-width: var(--content-wide);
  height: 1px;
  background: var(--color-divider);
}

/* ========================================================================
   ABOUT
   ======================================================================== */
.about-prose {
  max-width: 100%;
}

.about-prose p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}
.about-prose p:last-child { margin-bottom: 0; }

/* ========================================================================
   PROGRAMME
   ======================================================================== */
.programme-intro {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-4);
}

/* --- Partner Logos --- */
.partner-logos {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  flex-wrap: wrap;
  gap: var(--space-5) var(--space-6);
  margin-bottom: var(--space-10);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.partner-logo {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  white-space: nowrap;
  line-height: 1.2;
  transition: color var(--transition-interactive);
}
.partner-logo-link:hover .partner-logo {
  color: var(--color-text);
}

/* --- Partner Logo Links --- */
.partner-logo-link {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: opacity var(--transition-interactive), transform var(--transition-interactive);
}
.partner-logo-link:hover {
  transform: translateY(-1px);
}

/* --- Partner Logo Images --- */
.partner-logo-img {
  height: auto;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  filter: grayscale(100%) brightness(0.4);
  opacity: 0.65;
  transition: filter var(--transition-interactive), opacity var(--transition-interactive);
}
/* JPG logos with white backgrounds: use multiply blend so white stays white */
.partner-logo-img--jpg {
  mix-blend-mode: multiply;
  filter: grayscale(100%);
  opacity: 0.65;
}
.partner-logo-link:hover .partner-logo-img {
  filter: grayscale(0%) brightness(1);
  opacity: 1;
}
.partner-logo-link:hover .partner-logo-img--jpg {
  filter: grayscale(0%);
  opacity: 1;
}
.partner-logo-img--museum {
  height: 20px;
}
.partner-logo-img--ashvitas {
  height: 13px;
}
.partner-logo-img--chemould {
  height: 24px;
}

/* Dark mode: invert then re-apply grey */
[data-theme="dark"] .partner-logo-img {
  filter: invert(1) grayscale(100%) brightness(1.2);
  opacity: 0.55;
}
[data-theme="dark"] .partner-logo-link:hover .partner-logo-img {
  filter: invert(1) grayscale(0%) brightness(1.5);
  opacity: 1;
}
/* JPG logos in dark mode: invert + screen blend hides the inverted (now black) background */
[data-theme="dark"] .partner-logo-img--jpg {
  mix-blend-mode: screen;
  filter: invert(1) grayscale(100%) brightness(0.8) contrast(1.5);
  opacity: 0.55;
}
[data-theme="dark"] .partner-logo-link:hover .partner-logo-img--jpg {
  mix-blend-mode: screen;
  filter: invert(1) grayscale(0%) brightness(1.2) contrast(1.3);
  opacity: 1;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .partner-logo-img {
    filter: invert(1) grayscale(100%) brightness(1.2);
    opacity: 0.55;
  }
  :root:not([data-theme]) .partner-logo-link:hover .partner-logo-img {
    filter: invert(1) grayscale(0%) brightness(1.5);
    opacity: 1;
  }
  :root:not([data-theme]) .partner-logo-img--jpg {
    mix-blend-mode: screen;
    filter: invert(1) grayscale(100%) brightness(0.8) contrast(1.5);
    opacity: 0.55;
  }
  :root:not([data-theme]) .partner-logo-link:hover .partner-logo-img--jpg {
    mix-blend-mode: screen;
    filter: invert(1) grayscale(0%) brightness(1.2) contrast(1.3);
    opacity: 1;
  }
}

.partner-logo--contemporary {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  line-height: 1.25;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .partner-logos {
    gap: var(--space-5) var(--space-6);
  }
}

.events-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.event-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.event-date-bar {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.event-day {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.event-date {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  opacity: 0.9;
}

.event-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.event-type {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin: 0;
}

.event-time {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.event-title-block {
  margin: var(--space-1) 0 0;
}

.event-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  font-style: italic;
  line-height: 1.35;
}

.film-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-interactive), border-color var(--transition-interactive);
}
.film-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.event-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.event-speakers {
  margin-top: var(--space-2);
}

.event-speakers-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.event-speakers-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) 0;
}

.event-speakers-list li {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}

.event-speakers-list li + li::before {
  content: "|";
  color: var(--color-text-faint);
  margin: 0 var(--space-3);
  font-weight: 300;
}

/* --- Person Links --- */
.person-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-interactive), border-color var(--transition-interactive);
}
.person-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.event-location {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-interactive);
}
.event-location:hover {
  color: var(--color-primary);
}

.event-location svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.location-name {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.location-address {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.event-rsvp {
  align-self: center;
  margin-top: var(--space-4);
}

@media (max-width: 768px) {
  .events-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ========================================================================
   TEAM
   ======================================================================== */
.section-team {
  background: var(--color-surface);
}

.team-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 65ch;
  margin-bottom: var(--space-12);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.team-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-divider);
}

.team-photo-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-surface-2);
}

.team-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.6s var(--ease-out);
}
.team-photo--shift-down {
  object-position: center 30%;
}
.team-card:hover .team-photo {
  filter: grayscale(0%);
}

.team-info {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.team-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.team-bio {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
  margin-bottom: var(--space-4);
}

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

.team-social-row {
  display: flex;
  gap: var(--space-2);
}

@media (max-width: 768px) {
  .team-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ========================================================================
   CONTACT
   ======================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

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

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.form-input {
  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-base);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.12);
  outline: none;
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

@media (max-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ========================================================================
   FOOTER
   ======================================================================== */
.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo img {
  height: 28px;
  width: auto;
}

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

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* ========================================================================
   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 60%;
  }
}

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