/* ============================================================
   Sedna Robotics — Modern CSS
   Theme: Deep-space dark with cyan/teal tech accents
   ============================================================ */

:root {
  --bg-primary:    #080c18;
  --bg-secondary:  #0f1629;
  --bg-card:       #111827;
  --bg-card-hover: #161f35;
  --accent:        #00d4aa;
  --accent-dim:    #007a62;
  --accent2:       #4f8ef7;
  --text-primary:  #e8eaf0;
  --text-secondary:#9aa3b8;
  --text-muted:    #5a6380;
  --border:        #1e2a45;
  --border-accent: #00d4aa44;
  --success:       #22c55e;
  --error:         #ef4444;
  --shadow:        0 4px 24px rgba(0,0,0,0.5);
  --shadow-accent: 0 0 30px rgba(0,212,170,0.15);
  --radius:        12px;
  --radius-sm:     6px;
  --transition:    0.25s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #fff; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-dim); border-radius: 3px; }

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,12,24,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 clamp(1rem, 4vw, 3rem);
}
.header-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 1rem;
}
.logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 1.2rem; font-weight: 700; color: var(--text-primary);
  white-space: nowrap;
}
.logo svg { flex-shrink: 0; }
.logo span { color: var(--accent); }

.main-nav { display: flex; align-items: center; gap: 0.25rem; }
.main-nav a {
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent);
  background: rgba(0,212,170,0.08);
}

.lang-switch {
  display: flex; gap: 0.35rem;
}
.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
}
.lang-btn:hover, .lang-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,212,170,0.08);
}

.hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 4rem clamp(1rem, 4vw, 3rem);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0,212,170,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(79,142,247,0.08) 0%, transparent 70%),
    var(--bg-primary);
}
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
  opacity: 0.3;
}
.hero-content { position: relative; z-index: 1; max-width: 760px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: rgba(0,212,170,0.1);
  border: 1px solid var(--border-accent);
  color: var(--accent);
  padding: 0.35rem 1rem; border-radius: 999px;
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.05em;
  text-transform: uppercase; margin-bottom: 1.5rem;
}
.hero-badge::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 800; line-height: 1.1; letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}
.hero h1 .accent { color: var(--accent); }
.hero p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary); max-width: 560px; margin: 0 auto 2.5rem;
}
.hero-cta {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center;
}
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem; border-radius: var(--radius);
  font-weight: 600; font-size: 0.95rem;
  transition: all var(--transition); cursor: pointer;
  text-decoration: none; border: none;
}
.btn-primary {
  background: var(--accent); color: #000;
}
.btn-primary:hover {
  background: #00f5c4; color: #000; transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,212,170,0.4);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-outline:hover {
  border-color: var(--accent); color: var(--accent);
  background: rgba(0,212,170,0.06); transform: translateY(-2px);
}

/* ============================================================
   SECTIONS
   ============================================================ */
section { padding: 5rem clamp(1rem, 4vw, 3rem); }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-label {
  display: inline-block;
  color: var(--accent); font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.section-header p {
  color: var(--text-secondary); max-width: 580px; margin: 0 auto;
  font-size: 1.05rem;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about { background: var(--bg-secondary); }
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: all var(--transition);
}
.about-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-accent);
}
.card-icon {
  width: 48px; height: 48px;
  background: rgba(0,212,170,0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 1rem;
}
.about-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.about-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  display: flex; flex-direction: column;
}
.project-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow), var(--shadow-accent);
}
.project-header {
  background: linear-gradient(135deg, #0f1e38, #1a2a4a);
  padding: 2rem 1.75rem;
  display: flex; align-items: center; gap: 1rem;
}
.project-icon { font-size: 2.5rem; }
.project-header h3 { font-size: 1.15rem; font-weight: 700; }
.project-header span { color: var(--text-secondary); font-size: 0.85rem; }
.project-body { padding: 1.5rem 1.75rem; flex: 1; }
.project-body p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  background: rgba(0,212,170,0.08);
  border: 1px solid rgba(0,212,170,0.2);
  color: var(--accent);
  font-size: 0.75rem; font-weight: 600;
  padding: 0.2rem 0.6rem; border-radius: 999px;
}

/* ============================================================
   TECH STACK
   ============================================================ */
.tech { background: var(--bg-secondary); }
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}
.tech-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all var(--transition);
  cursor: default;
}
.tech-item:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.tech-item .tech-emoji { font-size: 2rem; margin-bottom: 0.6rem; }
.tech-item .tech-name { font-weight: 600; font-size: 0.9rem; }
.tech-item .tech-desc { color: var(--text-secondary); font-size: 0.78rem; margin-top: 0.25rem; }

/* ============================================================
   MY OTHER PROJECTS
   ============================================================ */
.other-projects { background: var(--bg-primary); }
.other-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  max-width: 860px; margin: 0 auto;
}
.other-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
  display: flex; flex-direction: column; gap: 1rem;
  position: relative; overflow: hidden;
}
.other-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.other-card.card-parlez::before { background: linear-gradient(90deg, #4f8ef7, #a855f7); }
.other-card.card-emunation::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.other-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow), var(--shadow-accent);
}
.other-card-header { display: flex; align-items: center; gap: 1rem; }
.other-card-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.75rem; flex-shrink: 0;
}
.card-parlez .other-card-icon { background: linear-gradient(135deg, rgba(79,142,247,0.2), rgba(168,85,247,0.2)); }
.card-emunation .other-card-icon { background: linear-gradient(135deg, rgba(245,158,11,0.2), rgba(239,68,68,0.2)); }
.other-card h3 { font-size: 1.2rem; font-weight: 700; }
.other-card .url { color: var(--text-muted); font-size: 0.8rem; }
.other-card p { color: var(--text-secondary); font-size: 0.9rem; flex: 1; }
.other-card-footer { display: flex; align-items: center; justify-content: space-between; }
.other-card-status {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.78rem; color: var(--success);
}
.other-card-status::before {
  content: ''; width: 7px; height: 7px; border-radius: 50%;
  background: var(--success);
}
.visit-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.85rem; font-weight: 600; color: var(--accent);
  transition: gap var(--transition);
}
.visit-link:hover { gap: 0.7rem; color: #fff; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact { background: var(--bg-secondary); }
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 3rem; align-items: start;
}
.contact-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.75rem; }
.contact-info p { color: var(--text-secondary); margin-bottom: 1.5rem; }
.contact-detail {
  display: flex; align-items: center; gap: 0.75rem;
  color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 0.75rem;
}
.contact-detail .cd-icon {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: rgba(0,212,170,0.1); display: flex; align-items: center;
  justify-content: center; font-size: 1rem; flex-shrink: 0;
}
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 600;
  color: var(--text-secondary); margin-bottom: 0.5rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 0.7rem 1rem;
  transition: border-color var(--transition);
  font-family: inherit;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,212,170,0.1);
}
.form-group textarea { min-height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-alert {
  padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  font-size: 0.9rem; margin-bottom: 1rem;
}
.form-alert.success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: var(--success); }
.form-alert.error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: var(--error); }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem clamp(1rem, 4vw, 3rem) 2rem;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 2rem; align-items: start;
}
.footer-brand .logo { margin-bottom: 0.75rem; }
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; max-width: 280px; }
.footer-links h4 { font-size: 0.85rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; }
.footer-links a {
  display: block; color: var(--text-muted); font-size: 0.85rem;
  margin-bottom: 0.4rem; transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1200px; margin: 2rem auto 0;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 0.5rem;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.82rem; }

/* ============================================================
   ADMIN STYLES
   ============================================================ */
.admin-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%; max-width: 400px;
}
.login-card h1 { font-size: 1.5rem; font-weight: 800; margin-bottom: 0.5rem; }
.login-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 2rem; }
.admin-header {
  background: rgba(8,12,24,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 1rem clamp(1rem, 4vw, 3rem);
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
}
.admin-body { max-width: 1200px; margin: 0 auto; padding: 2rem clamp(1rem, 4vw, 3rem); }
.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem; margin-bottom: 2rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.stat-card .stat-label { color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.5rem; }
.stat-card .stat-value { font-size: 2rem; font-weight: 800; color: var(--accent); }
.messages-list { display: flex; flex-direction: column; gap: 1rem; }
.message-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.message-card:has(.new) { border-left: 3px solid var(--accent); }
.message-meta {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.75rem; flex-wrap: wrap; gap: 0.5rem;
}
.message-from { font-weight: 700; font-size: 0.95rem; }
.message-email { color: var(--accent); font-size: 0.85rem; }
.message-date { color: var(--text-muted); font-size: 0.8rem; }
.message-subject { font-weight: 600; margin-bottom: 0.5rem; }
.message-body { color: var(--text-secondary); font-size: 0.9rem; white-space: pre-wrap; }
.badge-new {
  background: rgba(0,212,170,0.15); color: var(--accent);
  font-size: 0.72rem; font-weight: 700; padding: 0.15rem 0.5rem;
  border-radius: 999px; letter-spacing: 0.05em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem; gap: 0.25rem;
  }
  .hamburger { display: flex; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .other-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-cta { flex-direction: column; align-items: center; }
}