/* QuantFinco – Professional Quant / Fintech Theme */

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

:root {
  --bg-primary:    #0B1320;
  --bg-card:       #121B2E;
  --bg-card-hover: #17203A;
  --accent:        #10B981;
  --accent-hover:  #059669;
  --accent-light:  #34D399;
  --accent-blue:   #3a7bd5;
  --accent-amber:  #f0a500;
  --text-primary:  #E5E7EB;
  --text-muted:    #9CA3AF;
  --border:        #1F2A44;
  --nav-height:    68px;
}

/* ── Base ────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-light); }

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

/* ── Navbar ──────────────────────────────────────────────────────────────── */
.navbar {
  background: rgba(11, 19, 32, 0.95) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
  transition: background 0.3s;
  position: sticky; top: 0; z-index: 1000;
}

.navbar-brand {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-quant { color: var(--accent); }
.brand-finco { color: var(--text-primary); }

.navbar-nav .nav-link {
  color: var(--text-muted) !important;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  padding: 0.4rem 0.8rem !important;
  transition: color 0.2s;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active { color: var(--accent) !important; }

.btn-login {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  border-radius: 10px;
  padding: 0.35rem 1rem !important;
  font-size: 0.85rem;
  transition: all 0.2s;
}
.btn-login:hover {
  background: var(--accent);
  color: #0B1320 !important;
}

/* ── Hero Section ────────────────────────────────────────────────────────── */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 5rem 0;
}

.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(16,185,129,0.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 60% at 20% 80%, rgba(58,123,213,0.06) 0%, transparent 70%);
  pointer-events: none;
}

/* Grid lines – subtle emerald tint, lower opacity */
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(52,211,153,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(52,211,153,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1.2rem;
}

.hero h1 span { color: var(--accent); }

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }

.hero-tag {
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.22);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  letter-spacing: 0.5px;
  transition: background 0.2s, border-color 0.2s;
}
.hero-tag:hover {
  background: rgba(16,185,129,0.15);
  border-color: rgba(16,185,129,0.4);
  color: var(--accent-light);
}

.hero-stat {
  text-align: center;
  padding: 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.hero-stat .stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.hero-stat .stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0.3rem;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn-primary-custom {
  background: var(--accent);
  color: #0B1320;
  border: none;
  padding: 0.75rem 1.8rem;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.btn-primary-custom:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16,185,129,0.22);
  color: #fff;
}

.btn-outline-custom {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 0.75rem 1.8rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.btn-outline-custom:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.qf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.qf-card:hover {
  border-color: rgba(16,185,129,0.28);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4);
}

.card-icon {
  width: 52px; height: 52px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.card-icon.blue {
  background: rgba(58,123,213,0.1);
  border-color: rgba(58,123,213,0.2);
  color: var(--accent-blue);
}

.card-icon.amber {
  background: rgba(240,165,0,0.1);
  border-color: rgba(240,165,0,0.2);
  color: var(--accent-amber);
}

/* ── Section titles ──────────────────────────────────────────────────────── */
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}
.section-title span { color: var(--accent); }

.section-sub {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 3rem;
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}

/* ── Skill bars ──────────────────────────────────────────────────────────── */
.skill-bar { margin-bottom: 1.1rem; }
.skill-label {
  display: flex; justify-content: space-between;
  font-size: 0.85rem; font-weight: 600;
  margin-bottom: 0.35rem;
}
.skill-track {
  height: 5px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 3px;
  transition: width 1.2s ease;
}

/* ── Timeline (About page) ───────────────────────────────────────────────── */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.4rem; top: 0.4rem;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-primary);
}
.timeline-year {
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 1px; color: var(--accent);
  margin-bottom: 0.2rem;
}

/* ── Dashboard Widgets ───────────────────────────────────────────────────── */
.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.widget-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem 1.75rem;
  cursor: pointer;
  transition: all 0.25s;
  text-decoration: none;
  display: block;
  position: relative;
  overflow: hidden;
}
.widget-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.widget-card:hover::before { transform: scaleX(1); }
.widget-card:hover {
  border-color: rgba(16,185,129,0.35);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  background: var(--bg-card-hover);
}

.widget-icon {
  width: 60px; height: 60px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.7rem;
  margin-bottom: 1.2rem;
}

.widget-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.widget-desc { font-size: 0.84rem; color: var(--text-muted); line-height: 1.6; }
.widget-arrow {
  position: absolute; right: 1.5rem; bottom: 1.5rem;
  color: var(--accent); font-size: 1.2rem;
  opacity: 0; transition: opacity 0.2s, transform 0.2s;
}
.widget-card:hover .widget-arrow { opacity: 1; transform: translateX(4px); }

/* ── Dashboard sidebar ───────────────────────────────────────────────────── */
.dash-sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  min-height: calc(100vh - var(--nav-height));
  padding: 1.5rem 0;
  width: 220px;
  position: fixed; left: 0; top: var(--nav-height);
  overflow-y: auto;
}

.dash-sidebar .nav-link {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.6rem 1.5rem;
  display: flex; align-items: center; gap: 0.75rem;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}
.dash-sidebar .nav-link:hover,
.dash-sidebar .nav-link.active {
  color: var(--accent);
  background: rgba(16,185,129,0.06);
  border-left-color: var(--accent);
}

.dash-content {
  margin-left: 220px;
  padding: 2rem;
  min-height: calc(100vh - var(--nav-height));
}

/* ── Metric cards (dashboard) ────────────────────────────────────────────── */
.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}
.metric-label {
  font-size: 0.75rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 1px;
}
.metric-value {
  font-size: 1.8rem; font-weight: 800;
  line-height: 1.2; margin-top: 0.2rem;
}
.metric-value.positive { color: var(--accent); }
.metric-value.negative { color: #f56565; }
.metric-value.neutral  { color: var(--accent-blue); }

/* ── Forms ───────────────────────────────────────────────────────────────── */
.qf-form-control {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 10px;
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}
.qf-form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(16,185,129,0.12);
  background: var(--bg-card);
}
.qf-form-control::placeholder { color: var(--text-muted); }

select.qf-form-control option { background: var(--bg-card); }

.qf-label {
  font-size: 0.8rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.5px; margin-bottom: 0.4rem;
  display: block;
}

/* ── Tables ──────────────────────────────────────────────────────────────── */
.qf-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.qf-table th {
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.73rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.qf-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}
.qf-table tbody tr:hover { background: rgba(255,255,255,0.02); }

.badge-buy   { background: rgba(16,185,129,0.14);  color: var(--accent);       padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.75rem; font-weight: 700; }
.badge-sell  { background: rgba(245,101,101,0.15); color: #f56565;             padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.75rem; font-weight: 700; }
.badge-hold  { background: rgba(240,165,0,0.15);   color: var(--accent-amber); padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.75rem; font-weight: 700; }

/* ── Login page ──────────────────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse 70% 70% at 30% 50%, rgba(16,185,129,0.06), transparent),
    var(--bg-primary);
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3rem 2.5rem;
  width: 100%; max-width: 420px;
}
.login-logo {
  font-size: 1.8rem; font-weight: 800;
  text-align: center; margin-bottom: 0.3rem;
}

/* ── Blog cards ──────────────────────────────────────────────────────────── */
.blog-tag {
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--accent);
  background: rgba(16,185,129,0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

/* ── Strategy badge ──────────────────────────────────────────────────────── */
.strat-badge {
  display: inline-block;
  font-size: 0.72rem; font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  background: rgba(58,123,213,0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(58,123,213,0.25);
  margin-bottom: 0.75rem;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

/* ── Spinner ─────────────────────────────────────────────────────────────── */
.qf-spinner {
  width: 2rem; height: 2rem;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Alert overrides ─────────────────────────────────────────────────────── */
.alert { border-radius: 10px; border: none; font-size: 0.88rem; }
.alert-danger  { background: rgba(245,101,101,0.12); color: #fc8181; }
.alert-success { background: rgba(16,185,129,0.12);  color: var(--accent); }
.alert-info    { background: rgba(58,123,213,0.12);  color: #90cdf4; }
.alert-warning { background: rgba(240,165,0,0.12);   color: var(--accent-amber); }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .dash-sidebar { display: none; }
  .dash-content { margin-left: 0; padding: 1rem; }
  .hero h1 { font-size: 2rem; }
  .widget-grid { grid-template-columns: 1fr; }
}

/* ── Mobile navbar menu ──────────────────────────────────────────────────── */
@media (max-width: 991px) {
  .navbar-collapse {
    background: rgba(11, 19, 32, 0.98);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-top: 12px;
    padding: 12px 16px;
    backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  }

  .navbar-nav .nav-link {
    padding: 10px 12px !important;
    border-radius: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

  .navbar-nav .nav-link:last-child {
    border-bottom: none;
  }

  .navbar-nav .nav-link:hover,
  .navbar-nav .nav-link.active {
    background: rgba(16, 185, 129, 0.08);
  }

  .navbar .d-flex {
    padding: 10px 12px 4px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
  }

  .btn-login {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

/* ── Plotly chart overrides ──────────────────────────────────────────────── */
.plotly-chart { border-radius: 12px; overflow: hidden; }

/* ── Modal — shared across all pages ─────────────────────────────────────── */
.qf-modal-overlay {
  position: fixed; inset: 0; z-index: 9000;
  display: none;                          /* JS sets to flex when open */
  align-items: center; justify-content: center;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(4px);
  padding: 1rem;
  animation: qfFadeIn 0.2s ease;
}
@keyframes qfFadeIn { from { opacity: 0 } to { opacity: 1 } }

.qf-modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2rem;
  width: 100%;
  animation: qfSlideUp 0.25s ease;
}
@keyframes qfSlideUp {
  from { transform: translateY(24px); opacity: 0 }
  to   { transform: none; opacity: 1 }
}

.qf-modal-close {
  background: none; border: none;
  color: var(--text-muted); font-size: 1.4rem;
  cursor: pointer; line-height: 1; transition: color 0.2s;
}
.qf-modal-close:hover { color: var(--text-primary); }

.qf-form-control {
  display: block; width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}
.qf-form-control:focus {
  outline: none;
  border-color: var(--accent-blue);
}
.qf-form-control.is-invalid { border-color: #ef4444; }

.qf-label {
  display: block;
  font-size: 0.8rem; font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.qf-spinner {
  width: 2.5rem; height: 2.5rem;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: qfSpin 0.7s linear infinite;
  display: block;
}
@keyframes qfSpin { to { transform: rotate(360deg) } }