/**
 * Silkon Welfare Society - Main Stylesheet
 * Modern, Professional NGO Design with Green + Blue Theme
 */

/* ==================== Root Variables ==================== */
:root {
    --primary-color: #2563eb;      /* Blue */
    --secondary-color: #10b981;    /* Green */
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --white-color: #ffffff;
    --text-color: #334155;
    --border-color: #e2e8f0;

    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-mixed: linear-gradient(135deg, #2563eb 0%, #10b981 100%);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.2);

    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--dark-color);
}

a {
    text-decoration: none;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

.text-primary {
    color: var(--primary-color) !important;
}

.text-secondary {
    color: var(--secondary-color) !important;
}

.bg-primary {
    background: var(--gradient-primary) !important;
}

.bg-secondary {
    background: var(--gradient-secondary) !important;
}

/* ==================== Navigation ==================== */
.navbar {
    padding: 1rem 0;
    transition: var(--transition);
    z-index: 1000;
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 600;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    color: var(--text-color) !important;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color) !important;
    background-color: rgba(37, 99, 235, 0.1);
}

.nav-link.active {
    color: var(--primary-color) !important;
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* ==================== Buttons ==================== */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

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

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

/* ==================== Hero Section ==================== */
.hero-section {
    min-height: 85vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95) 0%, rgba(16, 185, 129, 0.95) 100%),
                url('https://images.unsplash.com/photo-1631815589968-fdb09a223b1e?w=1920') center/cover no-repeat;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.3) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-section .lead {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* ==================== Section Styles ==================== */
.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--gradient-mixed);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 3rem;
}

/* ==================== Cards ==================== */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    width: 70px;
    height: 70px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-mixed);
    color: white;
}

.service-card {
    height: 100%;
    border-radius: 15px;
    transition: var(--transition);
}

.service-card .card-body {
    padding: 2rem;
}

.service-card:hover .card-icon {
    transform: rotate(10deg) scale(1.1);
}

/* ==================== Stats Counter ==================== */
.stats-section {
    background: var(--gradient-mixed);
    color: white;
    padding: 4rem 0;
}

.stat-item {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ==================== Features Section ==================== */
.feature-box {
    padding: 2rem;
    border-radius: 15px;
    background: white;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    height: 100%;
}

.feature-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    background: var(--gradient-mixed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

/* ==================== Forms ==================== */
.form-control, .form-select {
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.15);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

/* ==================== Testimonials ==================== */
.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    position: relative;
    margin-top: 2rem;
}

.testimonial-card::before {
    content: '\f10e';
    font-family: 'Bootstrap Icons';
    position: absolute;
    top: -1rem;
    left: 2rem;
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.2;
}

/* ==================== Certificate Verification ==================== */
.certificate-card {
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    padding: 3rem;
    margin: 2rem 0;
}

.certificate-badge {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--gradient-mixed);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.certificate-badge i {
    font-size: 3rem;
    color: white;
}

/* ==================== Footer ==================== */
.footer {
    background: #1e293b;
    color: white;
}

.footer a {
    transition: var(--transition);
}

.footer a:hover {
    color: var(--primary-color) !important;
    transform: translateX(5px);
}

.social-links a {
    display: inline-block;
    transition: var(--transition);
}

.social-links a:hover {
    transform: translateY(-3px);
    color: var(--primary-color) !important;
}

/* ==================== Scroll to Top Button ==================== */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.scroll-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ==================== Animations ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease;
}

.animate-fadeInDown {
    animation: fadeInDown 0.6s ease;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .section {
        padding: 3rem 0;
    }
}

@media (max-width: 576px) {
    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-section .lead {
        font-size: 1rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
}

/* ==================== Utility Classes ==================== */
.bg-light-blue {
    background-color: rgba(37, 99, 235, 0.05);
}

.bg-light-green {
    background-color: rgba(16, 185, 129, 0.05);
}

.gradient-text {
    background: var(--gradient-mixed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-gradient {
    border: 3px solid;
    border-image: linear-gradient(135deg, #2563eb, #10b981) 1;
}