/* ── MaaSuraksha · Modern 3D Premium UI ── */

:root {
  --bg-gradient-1: #fdfbfb;
  --bg-gradient-2: #ebedee;
  --bg-gradient-3: #ffd1ff;
  --bg-gradient-4: #f4bcbc;
  --glass: rgba(255, 255, 255, 0.4);
  --glass-border: rgba(255, 255, 255, 0.6);
  --text: #1a1a2e;
  --text-muted: #5a5a75;
  --primary: #ff6b6b;
  --primary-glow: rgba(255, 107, 107, 0.4);
  --accent: #8e2de2;
  --card-bg: rgba(255, 255, 255, 0.5);
  --input-bg: rgba(255, 255, 255, 0.7);
  --input-border: rgba(255, 255, 255, 0.8);
  --divider: rgba(0, 0, 0, 0.06);
  --shadow-nm-light: -6px -6px 16px rgba(255, 255, 255, 0.9);
  --shadow-nm-dark: 6px 6px 16px rgba(180, 180, 200, 0.4);
  --shadow-nm-inset: inset 2px 2px 5px rgba(255,255,255,0.7), inset -3px -3px 7px rgba(180, 180, 200, 0.2);
  --shadow-card: 0 10px 40px rgba(31, 38, 135, 0.1);
  --radius: 24px;
  --radius-sm: 14px;
  --transition: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body.dark {
  --bg-gradient-1: #0f0c29;
  --bg-gradient-2: #302b63;
  --bg-gradient-3: #240b36;
  --bg-gradient-4: #1f1c2c;
  --glass: rgba(20, 20, 35, 0.4);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text: #eaeaf2;
  --text-muted: #9a9ab5;
  --primary: #ff8585;
  --primary-glow: rgba(255, 133, 133, 0.25);
  --accent: #b48deb;
  --card-bg: rgba(25, 25, 45, 0.5);
  --input-bg: rgba(0, 0, 0, 0.3);
  --input-border: rgba(255, 255, 255, 0.05);
  --shadow-nm-light: -4px -4px 10px rgba(40, 40, 60, 0.6);
  --shadow-nm-dark: 4px 4px 10px rgba(0, 0, 0, 0.5);
  --shadow-nm-inset: inset 2px 2px 5px rgba(255,255,255,0.05), inset -3px -3px 7px rgba(0,0,0,0.4);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  transition: color var(--transition);
  background: linear-gradient(-45deg, var(--bg-gradient-1), var(--bg-gradient-2), var(--bg-gradient-3), var(--bg-gradient-4));
  background-size: 300% 300%;
  animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ── 3D & Neumorphism Foundations ── */
.neu {
  box-shadow: var(--shadow-nm-light), var(--shadow-nm-dark), var(--shadow-card);
}

.neu-btn {
  box-shadow: var(--shadow-nm-light), var(--shadow-nm-dark);
  transition: all var(--transition);
}

.neu-btn:active {
  box-shadow: var(--shadow-nm-inset);
  transform: translateY(2px);
}

.tilt {
  transform-style: preserve-3d;
  transform: perspective(1000px);
}

.tilt-inner {
  transform: translateZ(30px);
}

/* ── Glass ── */
.glass {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: background var(--transition), border var(--transition), box-shadow var(--transition);
}

/* ── Navbar ── */
.navbar {
  margin: 1rem 2rem;
  padding: 0.9rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 60px;
  position: sticky;
  top: 1rem;
  z-index: 1000;
  transition: backdrop-filter 0.3s, background 0.3s, box-shadow 0.3s;
}

.navbar.nav-scrolled {
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  background: var(--card-bg);
  box-shadow: var(--shadow-nm-dark);
}

.logo {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transform: translateZ(10px);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  transform: translateZ(10px);
}

.icon-btn {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 1.15rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  color: var(--text-muted);
  box-shadow: var(--shadow-nm-light), var(--shadow-nm-dark);
}

.icon-btn:hover {
  transform: translateY(-2px) scale(1.05);
  color: var(--primary);
}

.icon-btn:active {
  box-shadow: var(--shadow-nm-inset);
  transform: translateY(1px);
}

.nav-btn {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1.2rem;
  border-radius: 20px;
  transition: all var(--transition);
  box-shadow: var(--shadow-nm-light), var(--shadow-nm-dark);
  background: var(--glass);
  border: 1px solid var(--glass-border);
}

.nav-btn:hover {
  color: var(--primary);
  transform: translateY(-2px);
}

.nav-btn:active {
  box-shadow: var(--shadow-nm-inset);
}

/* ── Hero ── */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5rem 5rem 2rem;
  gap: 4rem;
  perspective: 1200px;
}

.hero-text {
  max-width: 550px;
  transform-style: preserve-3d;
}

.hero-text h1 {
  font-family: 'Poppins', sans-serif;
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
  transform: translateZ(40px);
}

.hero-text h1 span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text p {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 450px;
  margin-bottom: 2.5rem;
  transform: translateZ(20px);
}

.hero-visual {
  width: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 40px;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.15), var(--shadow-nm-dark);
  border: 2px solid var(--glass-border);
  transform-style: preserve-3d;
}

/* ── Primary Button ── */
.primary-btn {
  background: linear-gradient(135deg, var(--primary), #ff8fa3);
  color: #fff;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: -0.01em;
  box-shadow: 0 10px 25px var(--primary-glow), var(--shadow-nm-dark);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-decoration: none;
  display: inline-block;
  text-align: center;
  position: relative;
  overflow: hidden;
  transform: translateZ(30px);
}

.primary-btn::after {
  content: '';
  position: absolute;
  top: 0; left: -100%; width: 50%; height: 100%;
  background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
  transform: skewX(-25deg);
  transition: all 0.7s ease;
}

.primary-btn:hover::after {
  left: 150%;
}

.primary-btn:hover {
  transform: translateZ(40px) translateY(-4px) scale(1.02);
  box-shadow: 0 15px 35px var(--primary-glow), var(--shadow-nm-dark);
}

.primary-btn.full {
  width: 100%;
}

/* ── Features ── */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 4rem 5rem 6rem;
  perspective: 1200px;
}

.feature-card {
  padding: 2.5rem;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  transform-style: preserve-3d;
}

.feature-card:hover {
  transform: scale(1.05) translateZ(20px);
  z-index: 10;
}

.feature-card h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  transform: translateZ(30px);
  color: var(--primary);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  transform: translateZ(20px);
}

/* ── Forms ── */
.form-wrapper {
  max-width: 520px;
  margin: 3rem auto;
  padding: 3rem;
  transform-style: preserve-3d;
}

.form-wrapper h2 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
  transform: translateZ(20px);
}

.subtext {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  transform: translateZ(15px);
}

.field {
  margin-bottom: 1.5rem;
  transform: translateZ(10px);
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input, select {
  width: 100%;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  font-size: 1rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  box-shadow: var(--shadow-nm-inset);
  transition: all var(--transition);
}

input:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow), var(--shadow-nm-inset);
  background: var(--card-bg);
}

.ml-note {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  transform: translateZ(10px);
}

/* ── Dashboard ── */
.dashboard {
  padding: 3rem 5rem;
}

.dashboard h2 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  perspective: 1000px;
}

.patient {
  padding: 1.8rem;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  transform-style: preserve-3d;
}

.patient:hover {
  transform: translateY(-5px) scale(1.02) translateZ(10px);
}

.patient h4 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  transform: translateZ(20px);
}

.patient p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  transform: translateZ(15px);
}

.patient small {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.8;
  transform: translateZ(10px);
}

.risk-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.5rem;
  box-shadow: var(--shadow-sm);
  transform: translateZ(25px);
}

.low { border-left: 4px solid #6bcf8e; }
.low .risk-badge { background: rgba(107, 207, 142, 0.15); color: #2c874e; }
.medium { border-left: 4px solid #f0b85a; }
.medium .risk-badge { background: rgba(240, 184, 90, 0.15); color: #a6701a; }
.high { border-left: 4px solid #ef7070; }
.high .risk-badge { background: rgba(239, 112, 112, 0.15); color: #a62626; }

body.dark .low .risk-badge { color: #6bcf8e; }
body.dark .medium .risk-badge { color: #f0b85a; }
body.dark .high .risk-badge { color: #ef7070; }

/* ── Footer ── */
footer {
  text-align: center;
  padding: 3rem 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--divider);
  margin-top: 4rem;
}

/* ── Loader ── */
#loader {
  position: fixed;
  inset: 0;
  background: var(--bg-gradient-1); /* Fallback */
  background: linear-gradient(-45deg, var(--bg-gradient-1), var(--bg-gradient-2), var(--bg-gradient-3), var(--bg-gradient-4));
  background-size: 400% 400%;
  animation: gradientBG 5s ease infinite;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

#loader p {
  margin-top: 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ── Auth swap link ── */
.auth-swap {
  text-align: center;
  margin-top: 1.5rem;
  cursor: pointer;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: opacity 0.2s, transform 0.2s;
  display: block;
}

.auth-swap:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    padding: 3rem 1.5rem;
    gap: 3rem;
  }
  .hero-text h1 { font-size: 2.8rem; }
  .hero-visual { width: 100%; }
  .features { grid-template-columns: 1fr; padding: 2rem 1.5rem; gap: 1.5rem; }
  .dashboard { padding: 2rem 1.5rem; }
  .navbar { margin: 1rem; padding: 0.8rem 1.2rem; }
  .form-wrapper { margin: 2rem 1.5rem; padding: 2rem; }
}