/* =========================================
   BASE — Reset, Typography, Global Styles
   ========================================= */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body-en);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--wide {
  max-width: var(--container-wide);
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* --- Section --- */
.section {
  padding: var(--section-padding);
}

.section--dark {
  background-color: var(--color-bg-secondary);
  background-image: radial-gradient(circle, var(--dot-color) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* --- Section Label (eyebrow pill) --- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-body-en);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-soft);
  margin-bottom: 1.25rem;
  background: rgba(139, 30, 45, 0.10);
  border: 1px solid rgba(139, 30, 45, 0.25);
  padding: 0.3rem 0.9rem 0.3rem 0.75rem;
  border-radius: 100px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.section-label::before {
  content: '✦';
  font-size: 0.55em;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  font-weight: 700;
  color: var(--color-text-primary);
}

.heading-display {
  font-family: var(--font-heading-en);
  font-size: clamp(3rem, 8vw, 7rem);
  letter-spacing: 0.02em;
  line-height: 1;
  text-transform: uppercase;
}

.heading-xl {
  font-family: var(--font-heading-en);
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.heading-lg {
  font-family: var(--font-heading-en);
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.heading-md {
  font-family: var(--font-body-en);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
}

.heading-bengali {
  font-family: var(--font-bengali);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 6rem);
  line-height: 1.1;
}

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

/* Gradient text for large headings only */
.heading-display .text-accent,
.heading-xl .text-accent,
.heading-lg .text-accent,
.heading-bengali .text-accent {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

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

.text-body {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.text-body--bengali {
  font-family: var(--font-bengali);
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text-secondary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body-en);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: 0 4px 24px var(--glow-red);
  transform: translateY(-1px);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border-light);
}

.btn--outline:hover {
  border-color: var(--color-accent-soft);
  color: var(--color-accent-soft);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(139,30,45,0.12);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  padding-left: 0;
  padding-right: 0;
}

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

.btn--lg {
  padding: 1rem 2.25rem;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

/* --- Glass Cards --- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: visible;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--card-shadow);
  position: relative;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

/* Frosted noise texture — makes glass visible even on solid backgrounds */
.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

.card > * {
  position: relative;
  z-index: 1;
}

.card:hover {
  border-color: rgba(139, 30, 45, 0.5);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

/* --- Dividers --- */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: var(--space-xl) 0;
}

/* --- Grid Utilities --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }

/* --- Flex Utilities --- */
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; }
.flex-col    { display: flex; flex-direction: column; }
.gap-sm      { gap: var(--space-sm); }
.gap-md      { gap: var(--space-md); }
.gap-lg      { gap: var(--space-lg); }

/* --- Noise Texture Overlay (applied via ::before pseudo) --- */
.noise-overlay {
  position: relative;
}
.noise-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-primary); }
::-webkit-scrollbar-thumb { background: var(--color-accent); border-radius: 3px; }

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

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  [data-aos] { opacity: 1 !important; transform: none !important; }
}

/* --- Responsive grid fallbacks --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4,
  .grid-3,
  .grid-2 { grid-template-columns: 1fr; }
}