/**
 * National Craftsman Pool Registration System
 * Main Stylesheet
 * 
 * Modern, mobile-responsive design with premium aesthetics
 */

/* ===== CSS Variables / Design Tokens ===== */
:root {
    /* Primary Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #f2994a 0%, #f2c94c 100%);
    --danger-gradient: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
    
    /* Base Colors */
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --success: #0f9d58;
    --warning: #f2994a;
    --danger: #eb3349;
    --info: #00b4d8;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Background */
    --bg-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --bg-light: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-sinhala: 'Noto Sans Sinhala', 'Iskoola Pota', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== Reset & Base Styles ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-dark);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Animated Background ===== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-animation::before,
.bg-animation::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.bg-animation::before {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.3) 0%, transparent 70%);
    top: -200px;
    right: -200px;
}

.bg-animation::after {
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.2) 0%, transparent 70%);
    bottom: -300px;
    left: -300px;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(50px, -50px) rotate(90deg); }
    50% { transform: translate(0, -100px) rotate(180deg); }
    75% { transform: translate(-50px, -50px) rotate(270deg); }
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.container-sm {
    max-width: 500px;
}

.container-lg {
    max-width: 1200px;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.card-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.card-subtitle {
    color: var(--gray-500);
    font-size: 0.95rem;
}

/* ===== Logo & Branding ===== */
.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.logo {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.brand-text {
    text-align: left;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
}

.brand-tagline {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

/* Sinhala Text Support */
.sinhala {
    font-family: var(--font-sinhala);
}

.label-bilingual {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.label-english {
    font-weight: 500;
    color: var(--gray-700);
}

.label-sinhala {
    font-family: var(--font-sinhala);
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ===== Form Styles ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--gray-700);
}

.form-label .required {
    color: var(--danger);
    margin-left: 4px;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--gray-800);
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    outline: none;
}

.form-control:hover {
    border-color: var(--gray-300);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
}

.form-control::placeholder {
    color: var(--gray-400);
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.form-control.is-valid {
    border-color: var(--success);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-text {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: var(--spacing-xs);
}

.invalid-feedback {
    display: none;
    font-size: 0.85rem;
    color: var(--danger);
    margin-top: var(--spacing-xs);
}

.form-control.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Radio & Checkbox */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
}

.form-check-input {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary);
}

.form-check-label {
    cursor: pointer;
    color: var(--gray-700);
}

.form-check-inline {
    display: inline-flex;
    margin-right: var(--spacing-lg);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
}

.btn-success {
    background: var(--success-gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(17, 153, 142, 0.4);
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(17, 153, 142, 0.5);
}

.btn-danger {
    background: var(--danger-gradient);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: var(--white);
}

.btn-lg {
    padding: 1rem 3rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.btn-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ===== Alerts ===== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert-success {
    background: rgba(17, 153, 142, 0.1);
    border: 1px solid rgba(17, 153, 142, 0.3);
    color: #0d7d71;
}

.alert-danger {
    background: rgba(235, 51, 73, 0.1);
    border: 1px solid rgba(235, 51, 73, 0.3);
    color: #c41e34;
}

.alert-warning {
    background: rgba(242, 153, 74, 0.1);
    border: 1px solid rgba(242, 153, 74, 0.3);
    color: #c77a2f;
}

.alert-info {
    background: rgba(0, 180, 216, 0.1);
    border: 1px solid rgba(0, 180, 216, 0.3);
    color: #0090ad;
}

/* ===== OTP Input ===== */
.otp-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
}

.otp-input {
    width: 55px;
    height: 65px;
    text-align: center;
    font-size: 1.75rem;
    font-weight: 600;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    background: var(--white);
    transition: all var(--transition-normal);
    outline: none;
}

.otp-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
    transform: scale(1.05);
}

.otp-input.filled {
    border-color: var(--success);
    background: rgba(17, 153, 142, 0.05);
}

/* ===== Progress Steps ===== */
.progress-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    padding: 0 var(--spacing-lg);
}

.step {
    display: flex;
    align-items: center;
}

.step-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-200);
    color: var(--gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: all var(--transition-normal);
}

.step.active .step-circle {
    background: var(--primary-gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.step.completed .step-circle {
    background: var(--success-gradient);
    color: var(--white);
}

.step-line {
    width: 60px;
    height: 3px;
    background: var(--gray-200);
    margin: 0 var(--spacing-sm);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.step.completed + .step .step-line,
.step.completed .step-line {
    background: var(--success-gradient);
}

.step-label {
    position: absolute;
    bottom: -25px;
    font-size: 0.75rem;
    color: var(--gray-500);
    white-space: nowrap;
}

/* ===== Loading Spinner ===== */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-dark {
    border-color: rgba(102, 126, 234, 0.3);
    border-top-color: var(--primary);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Timer ===== */
.timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    color: var(--gray-600);
    margin: var(--spacing-lg) 0;
}

.timer-value {
    font-weight: 600;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

.timer.expired .timer-value {
    color: var(--danger);
}

/* ===== Divider ===== */
.divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--gray-400);
    margin: var(--spacing-lg) 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

.footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.footer a:hover {
    color: white;
}

/* ===== Success Page ===== */
.success-container {
    text-align: center;
    padding: var(--spacing-2xl);
}

.success-icon {
    width: 100px;
    height: 100px;
    background: var(--success-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-xl);
    font-size: 3rem;
    color: white;
    animation: successPop 0.5s ease-out;
}

@keyframes successPop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.success-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-800);
}

.success-message {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.reference-number {
    display: inline-block;
    background: var(--gray-100);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    border: 1px dashed var(--primary);
}

/* ===== Admin Styles ===== */
.admin-header {
    background: var(--primary-gradient);
    color: white;
    padding: var(--spacing-lg);
    text-align: center;
    margin: -var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.admin-header h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.settings-group {
    background: var(--gray-50);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.settings-group-title {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    .card {
        padding: var(--spacing-lg);
        border-radius: var(--radius-md);
    }
    
    .card-title {
        font-size: 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .otp-container {
        gap: 6px;
    }
    
    .otp-input {
        width: 45px;
        height: 55px;
        font-size: 1.5rem;
    }
    
    .progress-steps {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .step-line {
        display: none;
    }
    
    .logo {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .brand-name {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .card {
        padding: var(--spacing-md);
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
    }
    
    .otp-input {
        width: 40px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.hidden { display: none !important; }
.visible { display: block; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* ===== Print Styles ===== */
@media print {
    .bg-animation,
    .btn,
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}