/* ========================================
   KPSHVT Alumni Association Website
   CSS Stylesheet
   ======================================== */

/* ========== Root Variables ========== */
:root {
    --primary-color: #003366;
    --secondary-color: #004080;
    --accent-color: #FFB81C;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-color: #ddd;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warning-color: #ffc107;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* ========== Global Styles ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: white;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== Header & Navigation ========== */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

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

.logo {
    flex: 1;
}

.logo h1 {
    font-size: 28px;
    margin-bottom: 5px;
    font-weight: 700;
    letter-spacing: 2px;
}

.logo p {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 300;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
    flex-wrap: wrap;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s, border-bottom 0.3s;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.nav .admin-link {
    background: var(--accent-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 5px;
    border: none;
}

.nav .admin-link:hover {
    opacity: 0.9;
    border-bottom: none;
}

/* ========== Hero Section ========== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== Page Title ========== */
.page-title {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

.page-title h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.page-title p {
    font-size: 16px;
    opacity: 0.9;
}

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 51, 102, 0.3);
}

.btn-secondary {
    background: var(--accent-color);
    color: var(--primary-color);
}

.btn-secondary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-large {
    padding: 15px 40px;
    font-size: 18px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ========== Sections ========== */
section {
    padding: 60px 20px;
}

section h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 40px;
    text-align: center;
}

section h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* About Section */
.about {
    background: var(--light-gray);
}

.about p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #555;
}

/* ========== Membership Types ========== */
.membership-types {
    background: white;
}

.membership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.membership-card {
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: all 0.3s;
}

.membership-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 51, 102, 0.2);
}

.membership-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.membership-card .amount {
    font-size: 28px;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: 20px;
}

.membership-card ul {
    list-style: none;
    text-align: left;
}

.membership-card li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.membership-card li:last-child {
    border-bottom: none;
}

/* ========== Benefits Section ========== */
.benefits {
    background: var(--light-gray);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.benefit-item {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all 0.3s;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 51, 102, 0.2);
}

.benefit-item h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.benefit-item p {
    color: #666;
    line-height: 1.6;
}

/* ========== CTA Section ========== */
.cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    color: white;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 30px;
}

/* ========== Contact Section ========== */
.contact {
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    background: var(--light-gray);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
}

.contact-item h3 {
    margin-bottom: 15px;
    font-size: 20px;
}

.contact-item p {
    color: #666;
    font-size: 16px;
}

/* ========== Form Styles ========== */
.registration-section,
.donation-section {
    background: var(--light-gray);
}

.form-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
    margin-bottom: 40px;
}

.form-wrapper {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.form-wrapper h2 {
    margin-bottom: 10px;
}

.form-subtitle {
    color: #666;
    margin-bottom: 30px;
}

.form-info-sidebar {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    height: fit-content;
}

.form-info-sidebar h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.form-info-sidebar ul {
    list-style: none;
    padding-left: 0;
}

.form-info-sidebar li {
    padding: 8px 0;
    color: #666;
    font-size: 14px;
}

/* Fieldsets */
fieldset {
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 25px;
    margin-bottom: 25px;
}

legend {
    padding: 0 15px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 16px;
}

/* Form Groups */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(255, 184, 28, 0.1);
}

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

.form-group small {
    display: block;
    margin-top: 5px;
    color: #999;
    font-size: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Checkboxes */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: normal;
    color: var(--text-color);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

/* Amount Display */
.amount-display {
    background: var(--light-gray);
    padding: 20px;
    border-radius: 5px;
    border-left: 4px solid var(--accent-color);
}

.amount-display p {
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--primary-color);
}

.amount-box {
    background: white;
    padding: 15px;
    border-radius: 5px;
    border: 2px solid var(--accent-color);
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-color);
    text-align: center;
}

/* Payment Info */
.payment-info {
    background: var(--light-gray);
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.payment-info p {
    margin-bottom: 15px;
    color: var(--text-color);
}

.qr-code-container {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 5px;
}

.qr-code-container img {
    max-width: 300px;
    margin-bottom: 15px;
}

#paymentModeText {
    color: #666;
    font-size: 14px;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.form-actions .btn {
    flex: 1;
    text-align: center;
}

/* Error Messages */
.error-message {
    display: block;
    color: var(--error-color);
    font-size: 12px;
    margin-top: 5px;
}

.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ========== Impact Section ========== */
.impact {
    background: var(--light-gray);
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.impact-item {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
}

.impact-item h4 {
    color: var(--accent-color);
    font-size: 28px;
    margin-bottom: 10px;
}

.impact-item p {
    color: #666;
}

/* ========== Footer ========== */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 50px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
    font-size: 16px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-section li {
    margin-bottom: 8px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav ul {
        justify-content: center;
        gap: 15px;
        font-size: 14px;
    }
    
    .hero-content h2 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .hero-buttons {
        gap: 10px;
    }
    
    .form-container {
        grid-template-columns: 1fr;
    }
    
    .form-wrapper {
        padding: 25px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    section h2 {
        font-size: 28px;
        margin-bottom: 30px;
    }
    
    .page-title h2 {
        font-size: 24px;
    }
    
    .form-info-sidebar {
        position: static;
    }
    
    fieldset {
        padding: 20px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header .logo h1 {
        font-size: 20px;
    }
    
    .nav ul {
        gap: 10px;
        font-size: 12px;
    }
    
    .hero-content h2 {
        font-size: 24px;
    }
    
    .hero {
        padding: 60px 20px;
    }
    
    section {
        padding: 40px 20px;
    }
    
    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .membership-grid,
    .benefits-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-wrapper {
        padding: 20px;
    }
    
    fieldset {
        padding: 15px;
    }
    
    .form-group label {
        font-size: 13px;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 8px;
    }
}

/* ========== Animations ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.membership-card,
.benefit-item,
.contact-item {
    animation: fadeIn 0.6s ease-out;
}

/* ========== Print Styles ========== */
@media print {
    .header,
    .nav,
    .footer,
    .form-actions,
    .admin-link {
        display: none;
    }
    
    body {
        font-size: 12px;
    }
    
    section {
        page-break-inside: avoid;
        padding: 20px;
    }
}