/* ═══════════════════════════════════════════════════
   BuYüm — Shared site chrome (header, footer, modal)
   ═══════════════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --bg-deep:          #0a0c14;
  --bg-surface:       #10131d;
  --glass-border:     rgba(255, 255, 255, 0.08);
  --text-primary:     #c8d0e0;
  --text-secondary:   rgba(200, 208, 224, 0.6);
  --text-dim:         rgba(200, 208, 224, 0.35);
  --accent-blue:      #4a7fb5;
  --accent-blue-glow: rgba(74, 127, 181, 0.15);
  --accent-amber:     #ff9100;
  --font-display:     'Syne', sans-serif;
  --font-mono:        'DM Mono', monospace;
  --font-body:        'DM Sans', sans-serif;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 12, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 28px 0;
  border-bottom: 1px solid var(--glass-border);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-wordmark {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  text-decoration: none;
}

.header-wordmark:hover { color: var(--text-secondary); }

.header-nav { display: flex; gap: 24px; }

.header-nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.3s;
}

.header-nav a:hover { color: var(--text-primary); }

/* ── Footer ── */
.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--glass-border);
  margin-top: 60px;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

/* ── Mail Modal ── */
.mail-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9000;
  align-items: center;
  justify-content: center;
}

.mail-overlay.open {
  display: flex;
}

.mail-modal {
  background: var(--bg-surface, #10131d);
  border: 1px solid var(--glass-border, rgba(255,255,255,0.08));
  border-radius: 16px;
  padding: 36px 40px 40px;
  width: 100%;
  max-width: 480px;
  margin: 20px;
  position: relative;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.mail-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}

.mail-modal-title {
  font-family: var(--font-mono, 'DM Mono', monospace);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-primary, #c8d0e0);
}

.mail-modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim, rgba(200,208,224,0.35));
  font-size: 20px;
  line-height: 1;
  padding: 0;
  transition: color 0.2s;
  margin-top: -2px;
}

.mail-modal-close:hover { color: var(--text-primary, #c8d0e0); }

.mail-form { display: flex; flex-direction: column; gap: 14px; }

.mail-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mail-field label {
  font-family: var(--font-mono, 'DM Mono', monospace);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim, rgba(200,208,224,0.35));
}

.mail-field input,
.mail-field select,
.mail-field textarea {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border, rgba(255,255,255,0.08));
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-body, 'DM Sans', sans-serif);
  font-size: 14px;
  color: var(--text-primary, #c8d0e0);
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}

.mail-field textarea {
  resize: vertical;
  min-height: 90px;
}

.mail-field input::placeholder,
.mail-field textarea::placeholder {
  color: var(--text-dim, rgba(200,208,224,0.35));
}

.mail-field input:focus,
.mail-field select:focus,
.mail-field textarea:focus {
  border-color: var(--accent-blue, #4a7fb5);
}

.mail-send-btn {
  margin-top: 8px;
  padding: 12px 24px;
  background: var(--accent-blue, #4a7fb5);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-family: var(--font-mono, 'DM Mono', monospace);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: filter 0.2s, transform 0.2s;
}

.mail-send-btn:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.mail-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .site-header { padding: 18px 0; }
  .site-footer  { padding: 18px 0; }

  .footer-inner {
    flex-direction: column;
    gap: 6px;
    text-align: center;
    padding: 0 18px;
  }

  .header-inner { padding: 0 18px; }

  .mail-modal { padding: 28px 24px 32px; }
}