:root {
  --bg-gradient-start: #111827;
  --bg-gradient-end: #030712;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  
  --accent-primary: #ffffff;
  --accent-hover: #f3f4f6;
  --accent-secondary: #6366f1;
  
  --nav-bg: rgba(3, 7, 18, 0.4);
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
  background: radial-gradient(circle at top center, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 90%);
  min-height: 100vh;
  color: var(--text-primary);
  font-family: 'Inter', system-ui, sans-serif;
  transition: background 0.4s ease, color 0.4s ease;
}

.container { width: 90%; max-width: 1200px; margin: auto; padding: 40px 0; }

/* NAVBAR */
.navbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 15px 30px;
  background: var(--nav-bg);
  border-radius: 16px; margin-bottom: 60px;
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  position: sticky; top: 20px; z-index: 100;
}
.logo { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.05em; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  text-decoration: none; color: var(--text-secondary);
  font-weight: 500; transition: all 0.3s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }

/* BUTTONS */
button, .btn {
  padding: 12px 24px; border: 1px solid var(--glass-border);
  border-radius: 8px; background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary); font-weight: 500; cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
button:hover, .btn:hover {
  background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}
button:active { transform: translateY(0); }

.cta-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 16px 36px; background: var(--text-primary);
  color: #030712; border-radius: 8px; text-decoration: none;
  font-weight: 600; box-shadow: 0 8px 30px rgba(255,255,255,0.15);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.cta-btn:hover { transform: translateY(-4px); background: #ffffff; box-shadow: 0 16px 40px rgba(255,255,255,0.25); }

.reset-btn {
  background: rgba(244, 63, 94, 0.1);
  color: #f43f5e;
  border-color: rgba(244, 63, 94, 0.3);
}
.reset-btn:hover {
  background: rgba(244, 63, 94, 0.2);
  color: white;
}

/* GRID & CARDS */
.dashboard-grid {
  display: grid; grid-template-columns: 2fr 1fr; gap: 30px; align-items: start;
}
@media(max-width:900px) { .dashboard-grid { grid-template-columns: 1fr; } }

.analytics-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-bottom: 50px;
}
@media(max-width:800px) { .analytics-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: 24px; padding: 32px; backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1); transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2); border-color: rgba(255, 255, 255, 0.12); }

/* MOOD SYSTEM */
.mood-selector {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 16px; margin-top: 24px;
}
.mood-btn {
  background: rgba(255,255,255,0.02); border: 1px solid var(--glass-border);
  border-radius: 18px; padding: 24px 10px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.mood-btn:hover {
  background: rgba(255,255,255,0.06); transform: translateY(-4px);
  border-color: var(--accent-secondary); box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}
.mood-emoji { font-size: 3rem; }
.mood-label { font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); }

/* TASKS */
.task-input { display: flex; gap: 12px; margin: 24px 0 32px; }
.task-input input {
  flex: 1; padding: 16px 20px; background: rgba(0,0,0,0.3); border: 1px solid var(--glass-border);
  border-radius: 12px; color: #fff; font-size: 1rem; transition: 0.3s;
}
.task-input input:focus { outline: none; border-color: var(--accent-secondary); box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3); }
#taskList { list-style: none; padding: 0; }
#taskList li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 20px; background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.04); border-radius: 12px;
  margin-bottom: 12px; transition: 0.3s;
}
#taskList li:hover { background: rgba(255,255,255,0.05); transform: translateX(4px); }
#taskList li.task-done { opacity: 0.5; border-color: transparent; }
#taskList li.task-done .task-text { text-decoration: line-through; color: var(--text-secondary); }
.task-text { font-size: 1.1rem; cursor: pointer; flex: 1; user-select: none; }
.task-actions { display: flex; gap: 8px; }
.btn-icon { padding: 8px; background: transparent; border: none; font-size: 1.2rem; display:flex; align-items:center; box-shadow: none; border-radius: 8px; }
.btn-icon:hover { transform: scale(1.1); background: rgba(255,255,255,0.1); }

/* PROGRESS BAR */
.progress-container {
  width: 100%; height: 8px; background: rgba(0,0,0,0.4);
  border-radius: 8px; margin-top: 16px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.05);
}
.progress-fill {
  height: 100%; border-radius: 8px; background: var(--accent-secondary);
  transition: all 1.2s cubic-bezier(0.4, 0, 0.2, 1); width: 0%;
}

/* TYPOGRAPHY */
h1 { font-size: 3.5rem; letter-spacing: -0.04em; font-weight: 700; line-height: 1.1; margin-bottom: 16px; }
h2 { font-size: 2rem; letter-spacing: -0.02em; font-weight: 600; margin-bottom: 12px; }
h3 { font-size: 1.25rem; font-weight: 500; color: var(--text-primary); margin-bottom: 15px; }
p { font-size: 1.125rem; line-height: 1.6; color: var(--text-secondary); }

.text-muted { color: var(--text-secondary); font-size: 0.95rem; }
.text-highlight { color: var(--text-primary); font-weight: 600; }

.hero-section span {
  background: linear-gradient(135deg, #a5b4fc 0%, #818cf8 50%, #6366f1 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; display: inline-block;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; align-items: center; margin-top: 40px; }

/* USER FEEDBACK & LISTS */
.guide-list { list-style: none; margin-top: 15px; }
.guide-list li { margin-bottom: 15px; display: flex; align-items: flex-start; gap: 15px; }
.guide-list li .step-num { 
  background: rgba(255,255,255,0.1); width: 30px; height: 30px; 
  display: flex; align-items: center; justify-content: center; 
  border-radius: 8px; font-weight: 600; color: var(--accent-secondary);
}

.score-breakdown {
  margin-top: 20px; background: rgba(0,0,0,0.2); 
  padding: 15px; border-radius: 12px; border: 1px solid var(--glass-border);
}
.score-row {
  display: flex; justify-content: space-between; margin-bottom: 8px; font-family: monospace; font-size: 0.9rem;
}

/* TOAST NOTIFICATION */
.toast-container {
  position: fixed; bottom: 30px; right: 30px;
  display: flex; flex-direction: column; gap: 10px; z-index: 1000; pointer-events: none;
}
.toast {
  background: var(--text-primary); color: #030712; padding: 16px 24px;
  border-radius: 12px; font-weight: 600; font-size: 1.05rem;
  box-shadow: 0 8px 30px rgba(0,0,0,0.3); pointer-events: auto;
  display: flex; align-items: center; gap: 10px;
  animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
@keyframes slideIn { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }
.toast.fadeOut { animation: slideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards; }
@keyframes slideOut { to { opacity: 0; transform: translateX(100%); } }

canvas { max-height: 100%; max-width: 100%; }

/* LIGHT THEME */
.light {
  --bg-gradient-start: #f8fafc; --bg-gradient-end: #e2e8f0;
  --text-primary: #0f172a; --text-secondary: #475569;
  --nav-bg: rgba(255,255,255,0.7); --glass-bg: rgba(255,255,255,0.8);
  --glass-border: rgba(0,0,0,0.05);
  --accent-primary: #1e293b;
}

.center { text-align: center; }
.site-footer { margin-top: 60px; opacity: 0.7; }

/* ================= MOBILE FIX ================= */
@media (max-width: 768px) {

  .container {
    width: 92%;
    padding: 20px 0;
  }

  .navbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 15px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px;
  }

  .dashboard-grid,
  .analytics-grid {
    grid-template-columns: 1fr !important;
    gap: 20px;
  }

  .card {
    padding: 20px;
    border-radius: 18px;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.1rem; }
  p { font-size: 0.95rem; }

  button, .btn, .cta-btn {
    width: 100%;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .task-input {
    flex-direction: column;
  }

  .mood-selector {
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  }

  .mood-emoji {
    font-size: 2rem;
  }

  .toast-container {
    right: 10px;
    left: 10px;
  }

  .toast {
    width: 100%;
    justify-content: center;
  }

  body {
    overflow-x: hidden;
  }
}