/* style.css — HUM Landing Page Design Tokens & 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,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3.5rem,   1rem    + 8vw,    10rem);

  /* 4px 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: 'Playfair Display', 'Georgia', serif;
  --font-body: 'IBM Plex Mono', 'Menlo', monospace;

  /* HUM Colors */
  --color-bg:             #FBF9F4;
  --color-surface:        #FCE9E7;
  --color-surface-2:      #FBF9F4;
  --color-surface-offset: #F5F2EB;
  --color-divider:        #D4CFC6;
  --color-border:         #C9C3B8;

  --color-text:           #1B1816;
  --color-text-muted:     #462B1E;
  --color-text-faint:     #9A8A7E;
  --color-text-inverse:   #FBF9F4;

  --color-primary:        #E34334;
  --color-primary-hover:  #C93526;
  --color-primary-active: #A82B1E;
  --color-primary-highlight: #FCE9E7;

  --color-accent-soft:    #F9C5C1;
  --color-lavender:       #999ECE;
  --color-olive:          #7F9527;
  --color-dark:           #1B1816;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-full: 9999px;

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

  /* Shadows */
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 60 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.02 60 / 0.08);

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

/* ========================
   LAYOUT
   ======================== */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

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

/* ========================
   SECTION SPACING
   ======================== */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section--hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-16);
}

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

.section--dark {
  background-color: #1B1816;
  color: #FBF9F4;
}

/* ========================
   TYPOGRAPHY
   ======================== */
.heading-display {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.heading-section {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.heading-sub {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
}

.overline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  font-weight: 400;
}

.body-text {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 60ch;
}

.body-text--large {
  font-size: var(--text-base);
}

/* ========================
   BUTTONS
   ======================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  min-height: 48px;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: #FBF9F4;
  border: 1px solid rgba(251, 249, 244, 0.4);
}
.btn--outline:hover {
  background: rgba(251, 249, 244, 0.1);
  border-color: rgba(251, 249, 244, 0.7);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
}
.btn--ghost:hover {
  background: var(--color-primary-highlight);
}

/* ========================
   HERO
   ======================== */
.hero__logo-wrap {
  display: flex;
  justify-content: center;
}

.hero__logo-img {
  height: clamp(140px, 20vw, 260px);
  width: auto;
  display: block;
}

.hero__content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}

.hero__logo {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 0.85;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.hero__tagline {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-text-muted);
  max-width: 52ch;
  text-align: center;
}

/* ========================
   MISSION CARDS
   ======================== */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

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

.mission-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mission-card__icon {
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-primary);
  font-family: var(--font-display);
}

.mission-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.3;
}

.mission-card__description {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* ========================
   WHAT MAKES US HUMAN
   ======================== */
.human-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1024px) {
  .human-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 640px) {
  .human-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.human-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.human-letter {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 2rem + 5vw, 7rem);
  font-weight: 400;
  line-height: 0.85;
  color: var(--color-text);
}

.human-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.human-desc {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* ========================
   IMAGE STRIP (Sessions)
   ======================== */
.image-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.image-strip__item {
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 4 / 3;
}

.image-strip__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.image-strip__item:hover img {
  transform: scale(1.04);
}

@media (max-width: 768px) {
  .image-strip {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

/* ========================
   FIVE LAYERS TIMELINE
   ======================== */
.layers-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--content-narrow);
  margin-inline: auto;
}

.layer-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
  align-items: start;
}

.layer-item:last-child {
  border-bottom: none;
}

.layer-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text-faint);
  line-height: 1;
  min-width: 2ch;
}

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

.layer-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.3;
}

.layer-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  font-weight: 500;
}

.layer-description {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 50ch;
}

/* ========================
   SXSW SECTION
   ======================== */
.sxsw-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-6);
}

.sxsw-date {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #F9C5C1;
  font-weight: 400;
}

.sxsw-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.1;
  color: #FBF9F4;
}

.sxsw-body {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: rgba(251, 249, 244, 0.7);
  max-width: 48ch;
  text-align: center;
}

.sxsw-location {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #F9C5C1;
}

/* ========================
   WAITLIST FORM
   ======================== */
.waitlist-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-8);
}

.waitlist-form {
  display: flex;
  gap: var(--space-3);
  width: 100%;
  max-width: 480px;
}

@media (max-width: 640px) {
  .waitlist-form {
    flex-direction: column;
  }
}

.waitlist-form input[type="email"] {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  min-height: 48px;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.waitlist-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.12);
}

.waitlist-form input[type="email"]::placeholder {
  color: var(--color-text-faint);
}

/* ========================
   FOOTER
   ======================== */
.footer {
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}

@media (max-width: 640px) {
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: 0.04em;
}

.footer__logo-img {
  height: 32px;
  width: auto;
  display: block;
  opacity: 0.8;
}

.footer__logo-horizontal {
  height: 40px;
  width: auto;
  display: block;
  opacity: 0.85;
}

.footer__meta {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .footer__meta {
    justify-content: center;
  }
}

.footer__meta a {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

/* ========================
   SCROLL ANIMATIONS
   ======================== */
.fade-in {
  opacity: 1; /* visible by default */
}

@supports (animation-timeline: view()) {
  .fade-in {
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 5% entry 40%;
  }
}

@keyframes reveal-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Staggered children */
.stagger > * {
  opacity: 1; /* visible by default */
}

@supports (animation-timeline: view()) {
  .stagger > *:nth-child(1) { animation-delay: 0ms; }
  .stagger > *:nth-child(2) { animation-delay: 80ms; }
  .stagger > *:nth-child(3) { animation-delay: 160ms; }
  .stagger > *:nth-child(4) { animation-delay: 240ms; }
  .stagger > *:nth-child(5) { animation-delay: 320ms; }

  .stagger > * {
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 5% entry 45%;
  }
}

/* ========================
   BRAND ICON ELEMENTS
   ======================== */

/* Section divider icon (U-circle between sections) */
.section-divider-icon {
  width: 36px;
  height: 36px;
  opacity: 0.15;
  display: block;
}

/* Mission card icons (replace unicode symbols) */
.mission-card__icon-img {
  width: 40px;
  height: auto;
  opacity: 0.7;
  display: block;
}

/* SXSW speech bubble accent */
.sxsw-bubble {
  width: 48px;
  height: auto;
  opacity: 0.25;
  display: block;
}

/* Waitlist section icon */
.waitlist-icon {
  width: 56px;
  height: auto;
  opacity: 0.12;
  display: block;
}

/* Footer brand group */
.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__icon {
  width: 24px;
  height: 24px;
  opacity: 0.6;
  display: block;
}

/* ========================
   DECORATIVE ELEMENTS
   ======================== */
.rule {
  width: 48px;
  height: 1px;
  background: var(--color-primary);
  margin-inline: auto;
}

.rule--left {
  margin-inline: 0;
}

/* ========================
   LINKS
   ======================== */
a {
  transition: color var(--transition-interactive),
              text-decoration-color var(--transition-interactive);
}