/* ==========================================================================
   Öztaylan İnşaat — Design System v2
   Aesthetic: Architectural Luxury
   Palette: Deep olive · Warm charcoal · Burnished gold
   Typography: Playfair Display + Plus Jakarta Sans
   ========================================================================== */

:root {
  /* ── Colour palette ── */
  --color-primary: #4f5d3e;
  --color-primary-light: #6b7d55;
  --color-primary-dark: #3a4530;
  --color-primary-muted: rgba(79, 93, 62, 0.08);
  --color-secondary: #161918;
  --color-secondary-light: #252a25;
  --color-accent: #c9a84c;
  --color-accent-light: #d9be6e;
  --color-accent-dark: #a88c3a;
  --color-accent-muted: rgba(201, 168, 76, 0.12);
  --color-white: #fafaf7;
  --color-off-white: #f3f2ec;
  --color-cream: #eae8e0;
  --color-gray-100: #e2e0d8;
  --color-gray-200: #c8c5ba;
  --color-gray-300: #8f8b80;
  --color-gray-400: #636058;
  --color-text: #1e211e;
  --color-text-muted: #52564f;
  --color-border: #dbd8cf;
  --color-error: #a3413d;
  --color-success: #3d6d4a;

  /* ── Typography ── */
  --font-display: "Playfair Display", "Georgia", serif;
  --font-body: "Plus Jakarta Sans", "Helvetica Neue", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --font-size-xs: 0.8125rem;    /* 13px */
  --font-size-sm: 0.9375rem;    /* 15px */
  --font-size-base: 1.0625rem;  /* 17px */
  --font-size-lg: 1.1875rem;    /* 19px */
  --font-size-xl: 1.375rem;     /* 22px */
  --font-size-2xl: 1.75rem;     /* 28px */
  --font-size-3xl: 2.25rem;     /* 36px */
  --font-size-4xl: 3rem;        /* 48px */
  --font-size-5xl: 3.75rem;     /* 60px */
  --font-size-hero: clamp(2.75rem, 6vw, 5rem);

  --line-height-tight: 1.15;
  --line-height-snug: 1.35;
  --line-height-normal: 1.65;
  --line-height-relaxed: 1.8;

  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: -0.01em;
  --letter-spacing-wide: 0.08em;
  --letter-spacing-ultra: 0.14em;

  /* ── Spacing (4px base, expanded) ── */
  --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-padding-y: clamp(4rem, 8vw, 7rem);
  --section-padding-x: clamp(1.25rem, 4vw, 3rem);
  --container-max: 1320px;

  /* ── Layout ── */
  --header-height: 76px;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* ── Shadows (layered for realism) ── */
  --shadow-xs: 0 1px 2px rgba(22, 25, 24, 0.04);
  --shadow-sm: 0 1px 3px rgba(22, 25, 24, 0.06), 0 1px 2px rgba(22, 25, 24, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(22, 25, 24, 0.07), 0 2px 4px -2px rgba(22, 25, 24, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(22, 25, 24, 0.08), 0 4px 6px -4px rgba(22, 25, 24, 0.04);
  --shadow-xl: 0 20px 40px -8px rgba(22, 25, 24, 0.1), 0 8px 16px -6px rgba(22, 25, 24, 0.05);
  --shadow-2xl: 0 32px 64px -12px rgba(22, 25, 24, 0.14);
  --shadow-inner: inset 0 2px 4px rgba(22, 25, 24, 0.04);
  --shadow-accent: 0 4px 14px rgba(201, 168, 76, 0.25);

  /* ── Transitions ── */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 150ms var(--ease-out-expo);
  --transition-base: 300ms var(--ease-out-expo);
  --transition-slow: 500ms var(--ease-out-expo);
  --transition-slower: 700ms var(--ease-out-quint);
}

/* ═══════════════════════════════════════════
   BASE RESET & DEFAULTS
   ═══════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: var(--line-height-normal);
  letter-spacing: var(--letter-spacing-normal);
  color: var(--color-text);
  background-color: var(--color-white);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

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

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

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-cream);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-cream);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-gray-300) var(--color-cream);
}

/* ═══════════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════════ */

.page-title {
  font-family: var(--font-display);
  font-size: var(--font-size-4xl);
  font-weight: 400;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-secondary);
  margin: 0;
}

@media (min-width: 768px) {
  .page-title { font-size: clamp(2.75rem, 4.5vw, 3.75rem); }
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 400;
  line-height: var(--line-height-snug);
  color: var(--color-secondary);
  margin: 0;
}

@media (min-width: 768px) {
  .section-title { font-size: clamp(1.75rem, 3vw, 2.5rem); }
}

/* Decorative label — small caps, tracked */
.label-accent {
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-ultra);
  text-transform: uppercase;
  color: var(--color-accent-dark);
}

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

/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--section-padding-x);
  padding-right: var(--section-padding-x);
}

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

/* ═══════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    transform var(--transition-fast),
    box-shadow var(--transition-base);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255,255,255,0.1) 0%, transparent 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after {
  opacity: 1;
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

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

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-secondary);
}

.btn--accent:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-secondary);
  box-shadow: var(--shadow-accent);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.6);
  backdrop-filter: blur(4px);
}

.btn--outline-light:hover {
  background-color: var(--color-white);
  color: var(--color-secondary);
  border-color: var(--color-white);
}

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

.btn--outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-xs);
}

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

/* ═══════════════════════════════════════════
   CARDS
   ═══════════════════════════════════════════ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition:
    box-shadow var(--transition-slow),
    transform var(--transition-slow),
    border-color var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.card__image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  display: block;
}

.card__body {
  padding: var(--space-6) var(--space-6) var(--space-8);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: 400;
  margin: 0 0 var(--space-2);
  color: var(--color-secondary);
  line-height: var(--line-height-snug);
}

.card__meta {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-gray-300);
  margin-bottom: var(--space-4);
}

/* ═══════════════════════════════════════════
   FORMS
   ═══════════════════════════════════════════ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-gray-400);
  margin-bottom: var(--space-2);
}

.form-control {
  width: 100%;
  padding: 0.875rem var(--space-4);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
  box-sizing: border-box;
  -webkit-appearance: none;
}

.form-control:hover {
  border-color: var(--color-gray-200);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-muted);
  background-color: #fff;
}

.form-control::placeholder {
  color: var(--color-gray-200);
  font-weight: 300;
}

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

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23636058' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.form-check__input {
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 3px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}

.form-check__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

.form-check__label a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-check__label a:hover {
  color: var(--color-primary-dark);
}

.field-validation-error {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  font-weight: 500;
}

.input-validation-error {
  border-color: var(--color-error) !important;
}

/* ═══════════════════════════════════════════
   UTILITY CLASSES
   ═══════════════════════════════════════════ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }

/* ── Grid system ── */
.grid {
  display: grid;
  gap: var(--space-8);
}

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

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ── Decorative gold rule ── */
.rule-accent {
  width: 48px;
  height: 2px;
  background: var(--color-accent);
  border: none;
  margin: var(--space-4) auto var(--space-6);
}

.rule-accent--left {
  margin-left: 0;
  margin-right: auto;
}