/* Base Styles — streamlined, professional, trust-focused palette */
:root {
    /* Trust + hope palette: calm blue, supportive teal, soft green tint */
    --primary: #2563eb;          /* Blue */
    --primary-light: #eaf2ff;    /* Very light blue */
    --secondary: #0f766e;        /* Teal */
    --text: #1f2937;             /* Slate-800 */
    --text-light: #6b7280;       /* Slate-500 */
    --background: #ffffff;
    --shadow: 0 4px 10px rgba(17, 24, 39, 0.08);
    --shadow-hover: 0 8px 20px rgba(17, 24, 39, 0.10);
    --radius: 10px;
    --transition: 180ms ease;    /* Short, subtle */
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans Bengali', 'Arial', sans-serif;
    line-height: 1.65;
    color: var(--text);
    background-color: var(--background);
    direction: ltr;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 { margin-bottom: 1rem; line-height: 1.25; font-weight: 700; }
p { margin-bottom: 1rem; }

a { text-decoration: none; color: var(--primary); transition: color var(--transition); }
a:hover { color: var(--secondary); }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

section {
    padding: 3.5rem 0;
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInBasic 400ms ease forwards;
}

@keyframes fadeInBasic { to { opacity: 1; transform: translateY(0); } }

.section-title {
    text-align: center;
    margin-bottom: 2.25rem;
    font-size: 2rem;
    color: var(--primary);
    position: relative;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 84px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px;
}

/* Buttons — subtle micro-interactions only */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary);
    color: #fff;
    border-radius: var(--radius);
    font-weight: 700;
    transition: background-color var(--transition), box-shadow var(--transition), transform var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}
.btn:hover { background-color: #1d4ed8; box-shadow: var(--shadow-hover); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-secondary:hover { background-color: var(--primary-light); }

/* Cards */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

/* ===== Header ===== */
header {
    position: sticky; top: 0;
    background-color: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
    z-index: 1000;
    backdrop-filter: blur(8px);
}
.header-container { display: flex; justify-content: space-between; align-items: center; padding: 0.9rem 1.5rem; }
.logo { display: flex; align-items: center; }

.logo img {
    height: 60px;
    width: 60px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 2px 6px rgba(0,0,0,0.12);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    border: 2px solid var(--primary-light);
}
.logo:hover img { transform: scale(1.04); box-shadow: 0 6px 16px rgba(0,0,0,0.16); }

.logo-text { margin-left: 0.75rem; font-weight: 800; font-size: 1.25rem; color: var(--primary); }

nav ul { display: flex; list-style: none; }
nav li { margin-left: 1.25rem; position: relative; }
nav a { font-weight: 700; color: var(--text); position: relative; padding-bottom: 4px; transition: color var(--transition); }
nav a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 2px;
    background-color: var(--primary);
    transition: width var(--transition);
}
nav a:hover::after, nav a.active::after { width: 100%; }
nav a:hover, nav a.active { color: var(--primary); }

.mobile-menu-btn { display: none; background: none; border: none; font-size: 1.6rem; cursor: pointer; color: var(--primary); transition: transform var(--transition); }
.mobile-menu-btn:hover { transform: scale(1.05); }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary-light) 0%, #ffffff 100%);
    padding: 5rem 0; text-align: center; position: relative; overflow: hidden;
}
.hero h1 { font-size: 2.4rem; margin-bottom: 1rem; color: var(--primary); }
.hero p { font-size: 1.15rem; max-width: 720px; margin: 0 auto 1.6rem; color: var(--text-light); }
.hero-buttons { display: flex; gap: 0.9rem; justify-content: center; flex-wrap: wrap; }
.stats { display: flex; justify-content: center; gap: 2rem; margin-top: 2.2rem; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat-label { color: var(--text-light); }

/* Mission */
.mission-content { max-width: 820px; margin: 0 auto; text-align: center; }

/* Programs */
.programs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.program-card { text-align: center; padding: 2rem 1.5rem; }
.program-icon { font-size: 2.25rem; margin-bottom: 0.75rem; color: var(--primary); transition: color var(--transition), transform var(--transition); }
.program-card:hover .program-icon { transform: scale(1.06); color: var(--secondary); }
.program-card h3 { font-size: 1.4rem; margin-bottom: 0.75rem; }

/* Gallery */
.gallery-preview .gallery-grid { column-count: 2; column-gap: 1rem; }
.gallery-item {
    break-inside: avoid; margin-bottom: 1rem; border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow); position: relative; transition: transform var(--transition), box-shadow var(--transition);
}
.gallery-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.gallery-item img { width: 100%; height: auto; display: block; opacity: 1; }
.gallery-caption { padding: 0.75rem; background: #fff; font-size: 0.95rem; transition: background-color var(--transition); }
.gallery-item:hover .gallery-caption { background-color: var(--primary-light); }

/* Get Involved */
.involve-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-bottom: 3rem; }
.involve-card { text-align: center; padding: 2rem; }
.form-container { max-width: 600px; margin: 0 auto; }
.form-group { margin-bottom: 1.25rem; position: relative; }
label { display: block; margin-bottom: 0.5rem; font-weight: 700; }
input, select, textarea {
    width: 100%; padding: 0.75rem; border: 1px solid #e5e7eb; border-radius: var(--radius);
    font-family: inherit; font-size: 1rem; transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
input:focus, select:focus, textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
    transform: translateY(-1px);
}

/* Donate */
.donate-content { max-width: 820px; margin: 0 auto 2rem; text-align: center; }
.payment-options { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; }
.payment-option { text-align: center; padding: 1.25rem; min-width: 220px; }

/* Team */
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
.team-member { text-align: center; }
.member-photo {
    width: 150px; height: 150px; border-radius: 50%;
    object-fit: cover; margin: 0 auto 1rem; background-color: var(--primary-light);
    display: flex; align-items: center; justify-content: center; font-size: 3rem; color: var(--primary);
    transition: transform var(--transition), box-shadow var(--transition);
}
.team-member:hover .member-photo { transform: scale(1.03); box-shadow: 0 8px 22px rgba(0,0,0,0.15); }

/* Contact */
.contact-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2.25rem; }
.contact-info { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-item {
    display: flex; align-items: flex-start; gap: 1rem; padding: 1rem; border-radius: var(--radius);
    transition: background-color var(--transition), transform var(--transition);
}
.contact-item:hover { background-color: var(--primary-light); transform: translateX(3px); }
.contact-icon { font-size: 1.4rem; color: var(--primary); transition: color var(--transition), transform var(--transition); }
.contact-item:hover .contact-icon { transform: scale(1.05); color: var(--secondary); }
.map-placeholder {
    height: 300px; background-color: var(--primary-light); border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center; color: var(--primary); font-weight: 700;
    transition: background-color var(--transition), color var(--transition), transform var(--transition);
    cursor: pointer;
}
.map-placeholder:hover { background-color: var(--primary); color: #fff; transform: scale(1.01); }

/* FAQ */
.faq-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.faq-item { padding: 1.5rem; position: relative; }
.faq-item h3 { color: var(--primary); margin-bottom: 0.75rem; }

/* Tables */
table {
    width: 100%; border-collapse: collapse; margin-top: 2rem; box-shadow: var(--shadow);
    border-radius: var(--radius); overflow: hidden;
}
th, td { padding: 1rem; text-align: left; border-bottom: 1px solid #e5e7eb; transition: background-color var(--transition); }
th { background-color: var(--primary); color: #fff; font-weight: 700; }
tr:nth-child(even) { background-color: #f9fafb; }
tr:hover { background-color: #f3f4f6; }

/* Custom amount */
#custom-amount { transition: opacity var(--transition), transform var(--transition); }

/* ===== Footer ===== */
footer {
    background-color: #0b1220; color: #e5e7eb; padding: 3rem 0 1.5rem;
    position: relative; overflow: hidden;
}
footer::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; margin-bottom: 2rem; }

.footer-logo { display: flex; align-items: center; margin-bottom: 1rem; }
.footer-logo img {
    height: 50px; width: 50px; border-radius: 50%;
    object-fit: cover; border: 2px solid var(--primary-light);
    transition: transform var(--transition);
}
.footer-logo:hover img { transform: scale(1.05); }
.footer-logo-text { margin-left: 0.75rem; font-weight: 800; font-size: 1.25rem; color: #fff; }

.footer-links h3, .footer-contact h3 {
    margin-bottom: 0.9rem; font-size: 1.1rem; position: relative; display: inline-block; color: #fff;
}
.footer-links h3::after, .footer-contact h3::after {
    content: ''; position: absolute; bottom: -6px; left: 0; width: 44px; height: 2px; background-color: var(--primary);
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.5rem; transition: transform var(--transition); }
.footer-links li:hover { transform: translateX(4px); }
.footer-links a { color: #cbd5e1; transition: color var(--transition), padding-left var(--transition); }
.footer-links a:hover { color: #fff; padding-left: 4px; }

.social-links { display: flex; gap: 0.8rem; margin-top: 1rem; flex-wrap: wrap; }
.social-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; background-color: rgba(255, 255, 255, 0.08);
    border-radius: 50%; color: #fff; transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}
.social-icon:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.25); background-color: rgba(255,255,255,0.12); }

.copyright {
    text-align: center; padding-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 0.9rem; color: #cbd5e1;
}

/* Page-specific hero */
.page-hero {
    background: linear-gradient(135deg, var(--primary-light) 0%, #ffffff 100%);
    padding: 3.2rem 0; text-align: center; position: relative; overflow: hidden;
}
.page-hero h1 { font-size: 2.2rem; margin-bottom: 0.75rem; color: var(--primary); }
.page-hero p { font-size: 1.15rem; max-width: 700px; margin: 0 auto; color: var(--text-light); }

/* Full Gallery Page */
.full-gallery { background-color: #f8fafc; }
.full-gallery .gallery-grid { column-count: 3; column-gap: 1rem; }

/* Scroll reveal utility */
.fade-in { opacity: 0; transform: translateY(10px); transition: opacity 360ms ease, transform 360ms ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 992px) {
    .gallery-grid { column-count: 2; }
    .full-gallery .gallery-grid { column-count: 2; }
}
@media (max-width: 768px) {
    .header-container { flex-wrap: wrap; }
    nav { width: 100%; margin-top: 0.75rem; display: none; }
    nav.active { display: block; }
    nav ul { flex-direction: column; }
    nav li { margin: 0.5rem 0; }
    .mobile-menu-btn { display: block; }

    .hero h1 { font-size: 2rem; }
    .hero p, .page-hero p { font-size: 1.05rem; }
    .page-hero h1 { font-size: 1.9rem; }
    .section-title { font-size: 1.7rem; }
    .gallery-grid, .full-gallery .gallery-grid { column-count: 1; }
}
@media (max-width: 576px) {
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn { width: 100%; max-width: 260px; }
    .stats { gap: 1.2rem; }
    .stat-number { font-size: 1.7rem; }
    .payment-options { flex-direction: column; align-items: center; }
    .payment-option { width: 100%; max-width: 320px; }
    .hero, .page-hero { padding: 2.6rem 0; }
}