/* ==========================================================================
   SINANZEYBEK.COM - PREMIUM DESIGN SYSTEM & TOKENS
   Clean, Organized White & Navy Blue Aesthetic + Meta Blue & Yellow Highlights
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@600;700&display=swap');

:root {
  /* Core Backgrounds */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-tertiary: #F1F5F9;
  --bg-surface: #FFFFFF;
  --bg-navy: #0B1727;
  --bg-navy-dark: #070E1A;
  --bg-navy-card: #0F1C30;

  /* Accent Colors */
  --blue-primary: #0052FF;
  --blue-hover: #0041CC;
  --blue-light: #EFF6FF;
  --blue-soft: #DBEAFE;
  --blue-glow: rgba(0, 82, 255, 0.25);

  --yellow-accent: #FFE600;
  --yellow-light: #FEF9C3;
  --green-accent: #10B981;
  --green-light: #ECFDF5;

  /* Typography */
  --text-main: #0B1727;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-dim: #94A3B8;
  --text-white: #FFFFFF;
  --text-white-muted: #CBD5E1;

  /* Borders */
  --border-subtle: #E2E8F0;
  --border-medium: #CBD5E1;
  --border-blue: rgba(0, 82, 255, 0.25);
  --border-dark: rgba(255, 255, 255, 0.1);

  /* Shadows */
  --shadow-sm: 0 2px 6px rgba(11, 23, 39, 0.04);
  --shadow-md: 0 10px 25px -4px rgba(11, 23, 39, 0.06), 0 4px 10px -2px rgba(11, 23, 39, 0.03);
  --shadow-lg: 0 20px 45px -8px rgba(11, 23, 39, 0.1), 0 8px 16px -4px rgba(11, 23, 39, 0.04);
  --shadow-glow: 0 12px 30px rgba(0, 82, 255, 0.25);

  /* Fonts */
  --font-heading: 'Plus Jakarta Sans', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Space Grotesk', sans-serif;

  /* Layout */
  --container-max: 1200px;
  --header-height: 76px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-body);
  font-family: var(--font-body);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body {
  line-height: 1.6;
  position: relative;
  background-color: var(--bg-primary);
  color: var(--text-body);
  overflow-x: hidden;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-main);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

p {
  font-family: var(--font-body);
  color: var(--text-body);
  font-size: 1rem;
}

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

.highlight-yellow {
  background: var(--yellow-accent);
  color: #0B1727;
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 800;
  display: inline-block;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--blue-light);
  border: 1px solid rgba(0, 82, 255, 0.2);
  color: var(--blue-primary);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.section-tag.tag-yellow {
  background: var(--yellow-light);
  border-color: rgba(234, 179, 8, 0.3);
  color: #854D0E;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px auto;
}

.section-header h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Sections */
section {
  padding: 84px 0;
  position: relative;
}

section.bg-light-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

section.bg-navy-dark {
  background-color: var(--bg-navy);
  color: #FFFFFF;
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-heading);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(0, 82, 255, 0.35);
}

.btn-primary:hover {
  background: var(--blue-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--text-main);
  border: 1.5px solid var(--border-subtle);
}

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

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

.btn-white:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
}