/* ===== Variables ===== */
:root {
  --color-bg: #f8fafc;
  --color-bg-card: #ffffff;
  --color-surface: #ffffff;
  --color-primary: #0ea5e9;
  --color-primary-hover: #0284c7;
  --color-primary-light: #e0f2fe;
  --color-accent: #06b6d4;
  --color-success: #10b981;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-border-focus: #0ea5e9;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --radius-lg: 16px;
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo span { color: var(--color-primary); }

.nav {
  display: flex;
  gap: 28px;
}
.nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav a:hover { color: var(--color-primary); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    flex-direction: column;
    padding: 20px;
    gap: 12px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s, opacity 0.25s, visibility 0.25s;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
  .nav-toggle span { transition: transform 0.2s, opacity 0.2s; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { box-shadow: 0 6px 12px rgba(14, 165, 233, 0.35); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  text-decoration: none;
}
.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn-hero {
  padding: 16px 32px;
  font-size: 1.1rem;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 80px 0 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, #f0f9ff 0%, #e0f2fe 35%, #f8fafc 70%);
  opacity: 0.95;
}
.hero-bg::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 140%;
  background: radial-gradient(ellipse, rgba(14, 165, 233, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.hero-title-line { display: block; }
.hero-title-line.accent {
  color: var(--color-primary);
  animation: fadeInUp 0.6s ease-out 0.15s both;
}
.hero-title .hero-title-line:first-child {
  animation: fadeInUp 0.6s ease-out both;
}

.hero-subtitle {
  margin: 0 0 32px;
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Sections ===== */
.section {
  padding: 64px 0;
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.section-title {
  margin: 0 0 8px;
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-text);
  text-align: center;
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin: 0 0 32px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ===== Calculator ===== */
.calculator-section { background: var(--color-bg); }

.calculator-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  max-width: 560px;
  margin: 0 auto;
  animation: fadeInUp 0.5s ease-out;
}

.calculator-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.calculator-field label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text);
}

.calculator-field input,
.calculator-field select {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.calculator-field input:focus,
.calculator-field select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.calculator-result {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.result-item {
  background: var(--color-primary-light);
  padding: 16px;
  border-radius: var(--radius);
  text-align: center;
}
.result-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}
.result-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
}

@media (max-width: 600px) {
  .calculator-row { grid-template-columns: 1fr; }
  .calculator-result { grid-template-columns: 1fr; }
}

/* ===== Offers ===== */
.offers-section { background: var(--color-surface); }

.offers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.offer-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s, box-shadow 0.25s;
  animation: fadeInUp 0.5s ease-out both;
}
.offer-card:nth-child(1) { animation-delay: 0.05s; }
.offer-card:nth-child(2) { animation-delay: 0.1s; }
.offer-card:nth-child(3) { animation-delay: 0.15s; }

.offer-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.offer-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 12px;
}
.offer-badge.highlight {
  background: #d1fae5;
  color: var(--color-success);
}

.offer-bank {
  margin: 0 0 12px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
}

.offer-details {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 12px;
}
.offer-rate {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
}
.offer-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.offer-desc {
  margin: 0 0 20px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== Form ===== */
.form-section { background: var(--color-bg); }

.basvuru-form {
  max-width: 560px;
  margin: 0 auto;
  animation: fadeInUp 0.5s ease-out;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-card);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input::placeholder { color: #94a3b8; }
.form-group input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.form-hint {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.form-actions { margin-top: 28px; margin-bottom: 0; }

.btn-submit {
  width: 100%;
  padding: 16px;
  font-size: 1.05rem;
}
.btn-submit .btn-loading { display: none; }
.btn-submit.loading .btn-text { display: none; }
.btn-submit.loading .btn-loading { display: inline; }

.form-message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  text-align: center;
}
.form-message.success {
  background: #d1fae5;
  color: #065f46;
}
.form-message.error {
  background: #fee2e2;
  color: #991b1b;
}

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* ===== Steps ===== */
.steps-section { background: var(--color-surface); }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 900px;
  margin: 0 auto;
}

.step-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s;
  animation: fadeInUp 0.5s ease-out both;
}
.step-card:nth-child(1) { animation-delay: 0.05s; }
.step-card:nth-child(2) { animation-delay: 0.1s; }
.step-card:nth-child(3) { animation-delay: 0.15s; }

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  border-radius: 50%;
  margin-bottom: 16px;
}

.step-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}
.step-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .steps-grid { grid-template-columns: 1fr; }
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 24px;
  margin-top: 32px;
}

.footer-top {
  text-align: center;
  margin-bottom: 24px;
}
.footer-tagline {
  margin: 8px 0 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.footer-links a:hover { color: var(--color-primary); }

.footer-copy {
  text-align: center;
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* opsiyonel */
.btn-loading { display:none; }
.is-loading .btn-text { display:none; }
.is-loading .btn-loading { display:inline; }

.form-message { margin-top:12px; padding:12px 14px; border-radius:12px; }
.form-message.success { background:#eafff1; border:1px solid #b6f0c8; }
.form-message.error { background:#fff2f2; border:1px solid #ffcdcd; }