/* ============================================================
   NikosB — Shared Base Styles
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

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

:root {
  --color-bg: #0a0e27;
  --color-surface: #151b33;
  --color-surface-hover: #1a2040;
  --color-accent: #2dd4a8;
  --color-accent-secondary: #5bc0eb;
  --color-text: #e0e0e0;
  --color-text-muted: #8892b0;
  --color-gradient: linear-gradient(135deg, #2dd4a8, #5bc0eb);
  --color-border: rgba(45, 212, 168, 0.15);
  --color-border-hover: rgba(45, 212, 168, 0.4);
  --font-main: 'Outfit', sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --max-width: 1100px;
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-weight: 400;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition);
}

a:hover {
  opacity: 0.8;
}

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 16px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 1;
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-gradient);
  color: #0a0e27;
  font-weight: 600;
}

.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(45, 212, 168, 0.3);
}

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

.btn-outline:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(45, 212, 168, 0.15);
}

/* Language Switcher */
.lang-switch {
  display: flex;
  gap: 4px;
  background: var(--color-surface);
  border-radius: 20px;
  padding: 3px;
}

.lang-btn {
  padding: 5px 12px;
  border-radius: 16px;
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn.active {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* Section */
.section {
  padding: 80px 0;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* Fade-in Animation */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Card base */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 4px 24px rgba(45, 212, 168, 0.08);
}

/* Footer shared */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 14px;
}

.site-footer a {
  color: var(--color-text-muted);
}

.site-footer a:hover {
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .section-subtitle {
    font-size: 15px;
    margin-bottom: 36px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 15px;
  }
}