/* ============================================================
   base.css — real. Design System
   Warm & Premium | Satoshi Variable | #FFFAF5 / #FF5100
   ============================================================ */

/* ─── Font ─────────────────────────────────────────────── */
@font-face {
  font-family: 'Satoshi';
  src: url('../fonts/Satoshi-Variable.woff2') format('woff2-variations');
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Satoshi';
  src: url('../fonts/Satoshi-VariableItalic.woff2') format('woff2-variations');
  font-weight: 300 900;
  font-style: italic;
  font-display: swap;
}

/* ─── Design Tokens ─────────────────────────────────────── */
:root {
  /* Colors */
  --color-bg:           #FFFAF5;
  --color-bg-alt:       #FFF4EE;
  --color-card:         #FFF4EE;
  --color-card-hover:   #FFEEe4;
  --color-accent:       #FF5100;
  --color-accent-hover: #E04600;
  --color-accent-light: #FFF0EB;
  --color-text:         #1A1A1A;
  --color-text-muted:   #6B6B6B;
  --color-text-light:   #999999;
  --color-border:       #EBEBEB;
  --color-border-warm:  #F0E8E0;
  --color-white:        #FFFFFF;

  /* Typography */
  --font-sans: 'Satoshi', system-ui, -apple-system, sans-serif;

  --text-xs:   clamp(0.75rem,  1.5vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 1.8vw, 1rem);
  --text-base: clamp(1rem,     2vw,   1.125rem);
  --text-lg:   clamp(1.125rem, 2.2vw, 1.25rem);
  --text-xl:   clamp(1.25rem,  2.5vw, 1.5rem);
  --text-2xl:  clamp(1.5rem,   3vw,   2rem);
  --text-3xl:  clamp(2rem,     4vw,   2.75rem);
  --text-4xl:  clamp(2.5rem,   5vw,   3.75rem);
  --text-5xl:  clamp(3rem,     6vw,   5rem);

  --weight-light:   300;
  --weight-regular: 400;
  --weight-medium:  500;
  --weight-bold:    700;
  --weight-black:   900;

  --leading-tight:  1.1;
  --leading-snug:   1.3;
  --leading-normal: 1.6;
  --leading-relaxed:1.8;

  --tracking-tight: -0.03em;
  --tracking-snug:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:  0.06em;
  --tracking-wider: 0.12em;

  /* 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;

  --section-y: clamp(4rem, 8vw, 7rem);
  --section-x: clamp(1.5rem, 5vw, 2.5rem);

  /* Radius */
  --radius-sm:   8px;
  --radius-md:   16px;
  --radius-lg:   24px;
  --radius-xl:   32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26,26,26,0.06), 0 1px 2px rgba(26,26,26,0.04);
  --shadow-md: 0 4px 16px rgba(26,26,26,0.08), 0 2px 6px rgba(26,26,26,0.04);
  --shadow-lg: 0 12px 40px rgba(26,26,26,0.10), 0 4px 12px rgba(26,26,26,0.06);
  --shadow-accent: 0 8px 32px rgba(255,81,0,0.20);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast:   150ms;
  --duration-normal: 300ms;
  --duration-slow:   500ms;
  --duration-enter:  700ms;

  /* Layout */
  --max-width:       1360px;
  --max-width-text:  720px;
  --max-width-narrow:580px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-snug);
}

p {
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

/* ─── Layout Utilities ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--section-x);
}

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

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

.section--alt {
  background-color: var(--color-bg-alt);
}

/* ─── Typography Utilities ──────────────────────────────── */
.eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
}

.heading-xl {
  font-size: var(--text-5xl);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}

.heading-lg {
  font-size: var(--text-4xl);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-tight);
}

.heading-md {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-snug);
}

.heading-sm {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
}

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

.text-accent {
  color: var(--color-accent);
}

/* ─── Button Styles ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: 1;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-accent);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn--primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.18) 50%, rgba(255,255,255,0) 100%);
  transform: translateX(-120%) skewX(-20deg);
  transition: transform 0.55s var(--ease-out);
  border-radius: inherit;
  pointer-events: none;
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 44px rgba(255,81,0,0.35);
}

.btn--primary:hover::after {
  transform: translateX(120%) skewX(-20deg);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-accent);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn--ghost {
  color: var(--color-text-muted);
  padding-inline: var(--space-4);
}

.btn--ghost:hover {
  color: var(--color-text);
}

/* ─── Card Styles ───────────────────────────────────────── */
.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border-warm);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-light);
}

/* ─── Divider ───────────────────────────────────────────── */
.divider {
  width: 48px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
  margin-block: var(--space-6);
}

/* ─── Scroll Animation Base ─────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity var(--duration-enter) var(--ease-out),
    transform var(--duration-enter) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 100ms; }
.reveal--delay-2 { transition-delay: 200ms; }
.reveal--delay-3 { transition-delay: 300ms; }
.reveal--delay-4 { transition-delay: 400ms; }

/* ─── Focus Styles ──────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ─── Selection ─────────────────────────────────────────── */
::selection {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* ─── Responsive Breakpoints ─────────────────────────────
   Mobile:  < 768px  (default)
   Tablet:  768px – 1199px
   Desktop: ≥ 1200px
──────────────────────────────────────────────────────── */
@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

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

@media (min-width: 1200px) {
  .hide-desktop { display: none !important; }
}