/* ==========================================================================
   supanida.com — Design System
   Minimal & editorial. UX portfolio for Supanida Jennings.
   Tone: structured calm, human warmth, deliberate whitespace.
   ========================================================================== */

/* ==========================================================================
   1. DESIGN TOKENS
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,500;0,600;1,400&family=Poppins:wght@300;400;500;600&display=swap');

:root {
  /* — Colors — */
  --color-bg-primary:    #FFFCF9;
  --color-bg-secondary:  #FDFDFD;
  --color-nav:           #FEFEFE;
  --color-text-heading:  #1A0E07;
  --color-text-body:     #3E4C60;
  --color-border:        #DADADA;

  /* Accent: warm terracotta — darkened for AA compliance */
  --color-accent:        #A65D3F;
  --color-accent-light:  #FAF6F0;
  --color-text-muted:    #637184;

  /* — Typography — */
  --font-heading: 'Playfair Display', serif;
  --font-body:    'Poppins', sans-serif;

  --text-hero:     clamp(38px, 6vw, 58px); /* fluid — scales with viewport */
  --text-h1:       clamp(30px, 4vw, 42px);
  --text-h2:       clamp(22px, 3vw, 30px);
  --text-h3:       20px;
  --text-body-lg:  18px;
  --text-body-md:  16px;
  --text-body-sm:  14px;
  --text-caption:  12px;

  --lh-hero:    1.08;
  --lh-heading: 1.2;
  --lh-body:    1.7;
  --lh-small:   1.5;

  --weight-light:    300;
  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;

  --tracking-hero:    -0.025em;
  --tracking-heading: -0.01em;
  --tracking-body:    0;
  --tracking-label:   0.06em;  /* tighter than default — more editorial */

  /* — Spacing — */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  48px;
  --space-xxl: 88px;

  /* — Radius — */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* — Shadows — */
  --shadow-card:       0 2px 16px rgba(33, 42, 56, 0.07);
  --shadow-card-hover: 0 8px 32px rgba(33, 42, 56, 0.12);

  /* — Transitions — */
  --transition-fast: 150ms ease;
  --transition-base: 240ms ease;
  --transition-slow: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}


/* ==========================================================================
   2. RESET & BASE
   ========================================================================== */

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 64px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  font-weight: var(--weight-regular);
  line-height: var(--lh-body);
  color: var(--color-text-body);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-base);
}

img, picture, video {
  display: block;
  max-width: 100%;
  height: auto;
}

ul, ol { list-style: none; }

input, button, textarea, select { font: inherit; }

hr {
  border: none;
  border-top: 1px solid var(--color-border);
}


/* ==========================================================================
   3. TYPOGRAPHY
   ========================================================================== */

.hero-title {
  font-family: var(--font-heading);
  font-size: var(--text-hero);
  font-weight: var(--weight-semibold);
  line-height: var(--lh-hero);
  letter-spacing: var(--tracking-hero);
  color: var(--color-text-heading);
}

/* Italic variant used for expressive emphasis in Playfair */
.hero-title em {
  font-style: italic;
  font-weight: var(--weight-regular);
  color: var(--color-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-h1);
  font-weight: var(--weight-semibold);
  line-height: var(--lh-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-text-heading);
}

.subsection-title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--weight-medium);
  line-height: var(--lh-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-text-heading);
}

.card-title {
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  line-height: 1.3;
  letter-spacing: var(--tracking-heading);
  color: var(--color-text-heading);
}

.lead {
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  font-weight: var(--weight-light);
  line-height: var(--lh-body);
  color: var(--color-text-body);
}

.body-text {
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  font-weight: var(--weight-regular);
  line-height: var(--lh-body);
  color: var(--color-text-body);
}

.small-text {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  line-height: var(--lh-small);
  color: var(--color-text-muted);
}

.caption {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: var(--weight-medium);
  line-height: var(--lh-small);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.nav-text {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  line-height: 1;
}

.button-text {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  line-height: 1;
}


/* ==========================================================================
   4. LAYOUT
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

/* Narrow container for text-heavy sections like About */
.container--narrow {
  max-width: 680px;
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.section {
  padding-block: var(--space-xxl);
}

.section--alt {
  background-color: var(--color-bg-secondary);
  padding-block: var(--space-xxl);
}

/* Mobile: tighten section transitions so the visual gap between
   Work → About → Contact feels even despite background changes. */
@media (max-width: 679px) {
  .section {
    padding-block: 64px;
  }
  .section--alt {
    padding-block: 64px;
  }
}

/* Section label — the small uppercase intro line above a heading */
.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

/* The horizontal rule before the label text — an editorial touch */
.section-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background-color: var(--color-border);
  flex-shrink: 0;
}

/* Grids — mobile-first single column */
.grid-2,
.grid-3 {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

/* Stack utilities */
.stack-xs > * + * { margin-top: var(--space-xs); }
.stack-sm > * + * { margin-top: var(--space-sm); }
.stack-md > * + * { margin-top: var(--space-md); }
.stack-lg > * + * { margin-top: var(--space-lg); }
.stack-xl > * + * { margin-top: var(--space-xl); }

/* Background helpers */
.bg-primary   { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }


/* ==========================================================================
   5. NAVIGATION
   ========================================================================== */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(254, 254, 254, 0.85);
  border-bottom: 0.75px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-nav__logo {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: var(--weight-semibold);
  letter-spacing: -0.01em;
  color: var(--color-text-heading);
  transition: opacity var(--transition-base);
}

.site-nav__logo:hover { opacity: 0.65; }

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text-heading);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--color-text-heading);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  width: 100%;
}


/* ==========================================================================
   6. HERO
   ========================================================================== */

.hero {
  padding-block: var(--space-xxl);
  padding-top: var(--space-xxl);
  border-top: 1.5px solid var(--color-text-heading);
}

.hero__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-content {
  max-width: 680px;
}

.hero-subtext {
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  font-weight: var(--weight-light);
  line-height: 1.65;
  color: var(--color-text-muted);
  max-width: 520px;
}

.hero-portrait {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: var(--radius-md);
  max-width: 340px;
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
}


/* ==========================================================================
   7. BUTTONS
   ========================================================================== */

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 13px var(--space-lg);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-base);
  white-space: nowrap;
}

.button-primary {
  background-color: var(--color-text-heading);
  color: var(--color-bg-primary);
  border-color: var(--color-text-heading);
}

.button-primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.button-secondary {
  background-color: transparent;
  color: var(--color-text-body);
  border-color: var(--color-border);
}

.button-secondary:hover {
  border-color: var(--color-text-heading);
  color: var(--color-text-heading);
  background-color: var(--color-accent-light);
}

.button-primary:focus-visible,
.button-secondary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}


/* ==========================================================================
   8. CASE STUDY CARDS
   ========================================================================== */

/* Work section intro — left-aligned, tight */
.work-intro {
  max-width: 560px;
  margin-bottom: var(--space-xl);
}

.case-study-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-slow), transform var(--transition-slow);
  cursor: pointer;
}

.case-study-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

/* Entire card is a link — wraps all children */
.case-study-card__link-wrap {
  display: contents; /* transparent wrapper — doesn't break layout */
}

.case-study-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-accent-light);
}

.case-study-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.case-study-card:hover .case-study-card__image img {
  transform: scale(1.04);
}

.case-study-card__body {
  padding: var(--space-lg) var(--space-lg) var(--space-xl);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-md);
}

.case-study-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.case-study-card__desc {
  font-size: var(--text-body-sm);
  line-height: var(--lh-body);
  color: var(--color-text-muted);
  flex: 1;
}

.case-study-card__cta {
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.case-study-card__cta-text {
  font-size: var(--text-body-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-heading);
  transition: color var(--transition-base);
}

.case-study-card:hover .case-study-card__cta-text {
  color: var(--color-accent);
}

/* Arrow icon — pure CSS, no SVG needed */
.case-study-card__arrow {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    border-color var(--transition-base),
    background-color var(--transition-base),
    transform var(--transition-base);
  font-size: 11px;
  color: var(--color-text-muted);
}

.case-study-card:hover .case-study-card__arrow {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: #fff;
  transform: translateX(2px);
}


/* ==========================================================================
   9. TAGS
   ========================================================================== */

.tag {
  display: inline-block;
  padding: 3px var(--space-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  border: 1px solid rgba(166, 93, 63, 0.3);
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  line-height: var(--lh-small);
}

.tag--neutral {
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}


/* ==========================================================================
   10. ABOUT SECTION
   ========================================================================== */

.about__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: start;
}

.about__body p + p {
  margin-top: var(--space-lg);
}

.about__body p {
  font-size: var(--text-body-lg);
  font-weight: var(--weight-light);
  line-height: var(--lh-body);
  color: var(--color-text-body);
}

/* Highlight the key sentence — the music-to-UX pivot */
.about__body strong {
  font-weight: var(--weight-semibold);
  color: var(--color-text-heading);
}

/* Sidebar: disciplines list */
.about__disciplines {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.about__discipline-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-body-sm);
  color: var(--color-text-body);
  font-weight: var(--weight-medium);
}

.about__discipline-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}


/* ==========================================================================
   11. CONTACT SECTION
   ========================================================================== */

.contact__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: start;
}

/* Form */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-label {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-heading);
  font-size: var(--text-body-md);
  line-height: var(--lh-body);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  outline: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.6;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-text-heading);
  box-shadow: 0 0 0 3px rgba(33, 42, 56, 0.06);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

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


/* ==========================================================================
   12. FOOTER
   ========================================================================== */

.footer {
  background-color: var(--color-text-heading);
  color: var(--color-bg-primary);
  padding-block: var(--space-xxl);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.footer__brand {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-heading);
  color: var(--color-bg-primary);
  line-height: 1.1;
}

.footer__tagline {
  font-size: var(--text-body-sm);
  color: rgba(255, 248, 246, 0.45);
  line-height: var(--lh-body);
  max-width: 300px;
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
}

.footer__link {
  font-family: var(--font-body);
  font-size: var(--text-body-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  color: rgba(255, 248, 246, 0.55);
  transition: color var(--transition-base);
}

.footer__link:hover {
  color: var(--color-bg-primary);
}

/* Icon variant — sized for SVG logos */
.footer__link--icon {
  display: inline-flex;
  align-items: center;
  opacity: 0.55;
  transition: opacity var(--transition-base);
}

.footer__link--icon:hover {
  opacity: 1;
  color: var(--color-bg-primary);
}

.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 248, 246, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-label);
  color: rgba(255, 248, 246, 0.28);
  text-transform: uppercase;
}


/* ==========================================================================
   13. PAGE ENTRANCE ANIMATION
   Subtle staggered fade-in — one orchestrated moment, not scattered effects.
   ========================================================================== */

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

.animate-in {
  animation: fadeUp 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
}

.animate-in--delay-1 { animation-delay: 0.1s; }
.animate-in--delay-2 { animation-delay: 0.22s; }
.animate-in--delay-3 { animation-delay: 0.34s; }
.animate-in--delay-4 { animation-delay: 0.46s; }


/* ==========================================================================
   14. RESPONSIVE — Tablet ≥ 680px
   ========================================================================== */

@media (min-width: 680px) {

  .container {
    padding-inline: var(--space-xl);
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__layout {
    grid-template-columns: 1fr auto;
    gap: var(--space-xxl);
  }

  .hero-portrait {
    max-width: 260px;
  }

  .contact__layout {
    grid-template-columns: 1fr 1fr;
  }

  .footer__top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
}


/* ==========================================================================
   15. RESPONSIVE — Desktop ≥ 1024px
   ========================================================================== */

@media (min-width: 1024px) {

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .section,
  .section--alt {
    padding-block: calc(var(--space-xxl) * 1.2);
  }

  .hero {
    padding-top: calc(var(--space-xxl) * 1.5);
  }

  .about__layout {
    grid-template-columns: 1fr 340px;
    gap: var(--space-xxl);
  }

  .hero-portrait {
    max-width: 300px;
  }

  .site-nav__inner {
    height: 68px;
  }
}


/* ==========================================================================
   16. REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }
}