/* 
 * Cerrahpaşa Tıp Fakültesi — Aday Öğrenci Websitesi
 * Component: Core & Base Layout
 */

/* ----------------------------------------------------
   1. DESIGN TOKENS & VARIABLES
   ---------------------------------------------------- */
:root {
  /* Color Palette */
  --color-primary: #8B1A2B;       /* CTF Koyu Bordo */
  --color-primary-dark: #6B1220;  /* Hover/Active Bordo */
  --color-primary-light: #B5273C; /* Aksan Açık Bordo */
  --color-cream: #FAF7F2;         /* Arka plan krem */
  --color-white: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6B;
  --color-border: #E8E0D8;
  --color-overlay: rgba(139, 26, 43, 0.72);
  --color-gold: #C9A84C;          /* Başarı / Aksan Altın */

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Lora', Palatino, serif;
  --font-ui: 'DM Sans', system-ui, -apple-system, sans-serif;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --container-width: 1200px;
  --navbar-height: 80px;
}

/* ----------------------------------------------------
   2. RESET & BASE STYLES
   ---------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--navbar-height);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
}

p {
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-ui);
  transition: var(--transition-fast);
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--color-cream);
}
::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 5px;
  border: 2px solid var(--color-cream);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

/* ----------------------------------------------------
   3. REUSABLE COMPONENTS & UTILITIES
   ---------------------------------------------------- */
.section {
  padding: 100px 24px;
  position: relative;
}

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

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

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* Grid & Layout System */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px auto;
}

.section-header h2 {
  font-size: 2.75rem;
  color: var(--color-primary);
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-bordo .section-header h2 {
  color: var(--color-white);
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background-color: var(--color-primary-light);
}

.section-bordo .section-header h2::after {
  background-color: var(--color-gold);
}

.section-header p {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.section-bordo .section-header p {
  color: rgba(255, 255, 255, 0.8);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 4px;
  letter-spacing: 0.5px;
  transition: var(--transition-normal);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(139, 26, 43, 0.2);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-white-outline {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-white);
}

.btn-white-outline:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

/* Entrance & Scroll Reveals */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Stagger reveals */
.stagger-container > *:nth-child(1) { transition-delay: 80ms; }
.stagger-container > *:nth-child(2) { transition-delay: 160ms; }
.stagger-container > *:nth-child(3) { transition-delay: 240ms; }
.stagger-container > *:nth-child(4) { transition-delay: 320ms; }
.stagger-container > *:nth-child(5) { transition-delay: 400ms; }