/* =============================================
   Sistem Prediksi Penyakit Tifus
   Custom Stylesheet
   ============================================= */

/* ---- CSS Variables / Design Tokens ---- */
:root {
    --primary: #0d9488; /* Medical Teal */
    --primary-dark: #0f766e;
    --primary-light: #2dd4bf;
    --secondary: #334155;
    --accent: #38bdf8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --body-bg: #f8fafc;
    --card-bg: #ffffff;
    
    --gradient-primary: linear-gradient(135deg, #0d9488 0%, #14b8a6 50%, #2dd4bf 100%);
    --gradient-medical: linear-gradient(135deg, #0f172a 0%, #0d9488 100%);
    --gradient-soft: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 100%);
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Global ---- */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #1e293b;
    background-color: #f8fafc;
    line-height: 1.6;
}

/* ---- Navbar ---- */
.bg-primary-gradient {
    background: var(--gradient-primary) !important;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.navbar {
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.3rem;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ---- Hero Section ---- */
.hero-section {
    background: var(--gradient-medical);
    color: white;
    padding: 6rem 0 8rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--primary-light);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

.text-gradient {
    background: linear-gradient(135deg, #2dd4bf, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.hero-illustration > .bi {
    color: rgba(59, 130, 246, 0.5);
    animation: pulse 3s ease-in-out infinite;
}

.hero-float-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    animation: float 4s ease-in-out infinite;
}

.hero-float-card.card-1 {
    top: 10%;
    right: -15%;
    animation-delay: 0s;
}

.hero-float-card.card-2 {
    bottom: 15%;
    left: -20%;
    animation-delay: 1.3s;
}

.hero-float-card.card-3 {
    bottom: -5%;
    right: 5%;
    animation-delay: 2.6s;
}

/* ---- Features Section ---- */
.feature-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    border: 1px solid rgba(0, 0, 0, 0.03);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-soft);
    color: var(--primary);
}

/* ---- Steps / How It Works ---- */
.step-card {
    padding: 2rem 1.5rem;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 8px 16px rgba(13, 148, 136, 0.25);
    margin-bottom: 1.5rem;
}

/* ---- Info Section ---- */
.info-item {
    display: flex;
    align-items: flex-start;
    padding: 0.75rem 0;
    font-size: 1rem;
}

.method-card {
    background: var(--gradient-soft);
    border: 1px solid var(--primary-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

/* ---- Footer ---- */
.footer-section {
    background: var(--secondary);
    border-top: 4px solid var(--primary);
    color: rgba(255,255,255,0.7);
}

/* ---- Global Overrides for Synchronization ---- */
.bg-primary { background-color: var(--primary) !important; }
.text-primary { color: var(--primary) !important; }
.border-primary { border-color: var(--primary) !important; }

/* ---- Buttons ---- */
.btn-primary {
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: 0.75rem 2rem;
    transition: var(--transition);
    color: white !important;
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(13, 148, 136, 0.35);
    background: var(--gradient-primary);
    opacity: 0.9;
}

.btn-white {
    background: #ffffff;
    color: var(--primary) !important;
    border: none;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    background: #f8fafc;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--primary-dark) !important;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.btn-outline-primary {
    border-color: var(--primary);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

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

/* ---- Cards & Layout Polishing ---- */
.auth-card, .card {
    border: none !important;
    box-shadow: var(--shadow-lg) !important;
    transition: var(--transition);
}

.auth-card:hover, .card:hover {
    box-shadow: var(--shadow-xl) !important;
}

/* Glassmorphism Effect */
.glass-panel {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
}

/* Badge Custom */
.badge-premium {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Progress Bar Custom */
.progress {
    background-color: #e2e8f0;
    border-radius: 50px;
    overflow: hidden;
}

/* ---- Auth Pages & Prediction Form ---- */
.auth-section {
    min-height: calc(100vh - 76px - 80px);
    background: var(--gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 0;
}

.prediction-card {
    border-radius: var(--radius-xl) !important;
    overflow: hidden;
    border: none !important;
    box-shadow: var(--shadow-xl) !important;
}

.prediction-header {
    background: var(--gradient-medical);
    padding: 3.5rem 3rem;
    color: white;
}

/* Multi-step progress */
.step-item.active .step-node {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 5px rgba(13, 148, 136, 0.15) !important;
}

.step-line-fill {
    background: var(--primary) !important;
}

/* Custom Checkbox for Symptoms */
.custom-checkbox {
    transition: var(--transition);
    border: 2px solid #e2e8f0 !important;
    border-radius: var(--radius-md) !important;
    background: white;
}

.custom-checkbox:hover {
    border-color: var(--primary-light) !important;
    background-color: var(--body-bg) !important;
}

.custom-checkbox:has(input:checked) {
    border-color: var(--primary) !important;
    background-color: #f0fdfa !important;
}

.custom-checkbox input:checked + label .feature-label {
    color: var(--primary);
}

/* Result Cards */
.result-card-positive {
    border-left: 6px solid var(--danger);
    background: #fef2f2;
}

.result-card-negative {
    border-left: 6px solid var(--success);
    background: #f0fdf4;
}

/* ---- Auth & Form Precision ---- */
.auth-card {
    background: white;
    padding: 3rem 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(226, 232, 240, 0.6);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.08) !important;
}

.auth-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-soft);
    color: var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 1.5rem;
    border: 1px solid rgba(13, 148, 136, 0.1);
}

.form-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--secondary);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
}

.form-label i {
    font-size: 1.1rem;
    color: var(--primary);
}

.form-control {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1.5px solid #e2e8f0;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 4px rgba(45, 212, 191, 0.1);
    outline: none;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group .btn {
    border: 1.5px solid #e2e8f0;
    border-left: none;
    border-top-right-radius: var(--radius-md) !important;
    border-bottom-right-radius: var(--radius-md) !important;
    color: #64748b;
    padding: 0 1rem;
}

.input-group .btn:hover {
    color: var(--primary);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-label {
    cursor: pointer;
    user-select: none;
}

/* Animations */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}