/* Modern Design System - Jela Seba */
@import url('https://fonts.googleapis.com/css2?family=Anek+Bangla:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Base Colors */
    --primary-color: #0ea5e9;
    /* Sky 500 */
    --primary-hover: #0284c7;
    /* Sky 600 */
    --secondary-color: #64748b;
    /* Slate 500 */
    --success: #22c55e;
    /* Green 500 */
    --danger: #ef4444;
    /* Red 500 */
    --warning: #f59e0b;
    /* Amber 500 */
    --info: #3b82f6;
    /* Blue 500 */

    /* Neutrals */
    --bg-body: #f8fafc;
    /* Slate 50 */
    --bg-card: #ffffff;
    --text-main: #0f172a;
    /* Slate 900 */
    --text-light: #64748b;
    /* Slate 500 */
    --border-color: #e2e8f0;
    /* Slate 200 */

    /* Shadows */
    --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);

    /* Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* Seasonal Overrides */
body.theme-winter {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
}

body.theme-summer {
    --primary-color: #f59e0b;
    --primary-hover: #d97706;
}

body.theme-monsoon {
    --primary-color: #059669;
    --primary-hover: #047857;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Anek Bangla', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 4rem 0;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

h1 {
    font-size: 2.5rem;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 2rem;
    letter-spacing: -0.025em;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-hover);
}

/* Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 1rem;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: 1.5rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Forms */
.form-control,
input[type="text"],
input[type="email"],
input[type="number"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--bg-card);
}

.form-control:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-main);
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-main);
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary-color);
}

/* Hero */
.hero {
    background-size: cover;
    background-position: center;
    color: white;
    padding: 8rem 0 6rem;
    text-align: center;
}

.hero h1,
.hero p {
    color: white;
}

/* Footer */
.footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 4rem 0 2rem;
}

.footer h3,
.footer h4 {
    color: white;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-4 {
    gap: 1rem;
}
/* Donation Tabs */
.donation-tabs {
    display: flex;
    background: #f1f5f9;
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn.active {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

/* Selection Cards (Amount & Payment) */
.selection-card {
    border: 2px solid var(--border-color);
    background: white;
    padding: 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 100%;
    color: var(--text-main);
    min-height: 60px;
}

.selection-card:hover {
    border-color: #cbd5e1;
    background: #f8fafc;
}

.selection-card.active {
    border-color: var(--primary-color);
    background: rgba(14, 165, 233, 0.05);
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.1);
}

.selection-card img {
    height: 2.5rem;
    width: auto;
    object-fit: contain;
}