/* =========================================
   VNA (Village Network Alliance) — Custom CSS
   স্লোগান: আলোকিত প্রাণ, সমৃদ্ধ গ্রাম
   ========================================= */

/* ===== CSS ভেরিয়েবল ===== */
:root {
    --vna-primary: #1a472a;       /* গাঢ় সবুজ — গ্রামের রং */
    --vna-secondary: #2d6a4f;     /* মাঝারি সবুজ */
    --vna-accent: #f4a261;        /* উষ্ণ কমলা — উন্নয়নের আলো */
    --vna-gold: #e9c46a;          /* সোনালি */
    --vna-light: #f8f9fa;
    --vna-dark: #1b2535;
    --vna-text: #2c3e50;
    --vna-border: #dee2e6;
    --font-bengali: 'Hind Siliguri', sans-serif;
    --font-english: 'Inter', sans-serif;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --radius: 12px;
}

/* ===== বেসিক টাইপোগ্রাফি ===== */
body {
    font-family: var(--font-bengali);
    color: var(--vna-text);
    background-color: #f0f4f0;
    line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-bengali);
    font-weight: 700;
}

/* ===== ন্যাভবার ===== */
.bg-vna-primary {
    background: linear-gradient(135deg, var(--vna-primary) 0%, var(--vna-secondary) 100%) !important;
}

.navbar-brand .vna-logo-text {
    background: var(--vna-gold);
    color: var(--vna-dark);
    font-weight: 800;
    font-size: 1.2rem;
    padding: 6px 12px;
    border-radius: 8px;
    font-family: var(--font-english);
}

.navbar .nav-link {
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.4rem 0.55rem !important;
    border-radius: 8px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
}

.navbar .nav-link i,
.navbar .nav-link .bi {
    font-size: 0.95rem;
    line-height: 1;
    flex-shrink: 0;
}

/* ড্রপডাউন টগল অ্যারো ছোট */
.navbar .nav-link.dropdown-toggle::after {
    margin-left: 2px;
}

/* আইটেমগুলোর মাঝে ফাঁকা কম */
.navbar-nav.ms-auto {
    gap: 1px !important;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
    background: rgba(255,255,255,0.15);
    color: var(--vna-gold) !important;
}

/* ===== বাটন ===== */
.btn-vna {
    background: linear-gradient(135deg, var(--vna-primary), var(--vna-secondary));
    color: white;
    border: none;
    border-radius: var(--radius);
    padding: 12px 28px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-vna:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--vna-gold);
}

.btn-donate {
    background: linear-gradient(135deg, #e63946, #c1121f);
    color: white;
    border: none;
    border-radius: var(--radius);
    padding: 12px 28px;
    font-weight: 700;
    transition: var(--transition);
    animation: pulse-donate 2s infinite;
}

@keyframes pulse-donate {
    0%, 100% { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(230, 57, 70, 0); }
}

/* ===== হিরো সেকশন ===== */
.hero-section {
    background: linear-gradient(135deg, var(--vna-primary) 0%, var(--vna-secondary) 60%, #52b788 100%);
    color: white;
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-section h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero-badge {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    padding: 6px 16px;
    display: inline-block;
    margin-bottom: 16px;
    font-size: 0.85rem;
}

/* ===== কার্ড ===== */
.vna-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--vna-border);
    overflow: hidden;
}

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

.vna-card .card-img-top {
    height: 200px;
    object-fit: cover;
}

/* ===== স্ট্যাটিস্টিক্স কার্ড ===== */
.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 4px solid var(--vna-accent);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-bottom-color: var(--vna-primary);
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--vna-primary);
    line-height: 1;
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    color: var(--vna-accent);
    margin-bottom: 10px;
}

/* ===== সেকশন হেডিং ===== */
.section-heading {
    text-align: center;
    margin-bottom: 50px;
}

.section-heading h2 {
    color: var(--vna-primary);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    position: relative;
    display: inline-block;
}

.section-heading h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--vna-accent);
    border-radius: 2px;
}

.section-heading p {
    color: #6c757d;
    font-size: 1.05rem;
    max-width: 600px;
    margin: 15px auto 0;
}

/* ===== সদস্যপদ ব্যাজ ===== */
.badge-free     { background: #6c757d; }
.badge-general  { background: var(--vna-secondary); }
.badge-premium  { background: var(--vna-accent); color: #333; }
.badge-student  { background: #0077b6; }
.badge-volunteer { background: #e63946; }

/* ===== ফিনান্স টেবিল ===== */
.finance-table th {
    background: var(--vna-primary);
    color: white;
    font-weight: 600;
    border: none;
}

.income-row { border-left: 4px solid #2dc653; }
.expense-row { border-left: 4px solid #e63946; }

.balance-positive { color: #2dc653; font-weight: 700; }
.balance-negative { color: #e63946; font-weight: 700; }

/* ===== ফর্ম ===== */
.vna-form {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.vna-form .form-control,
.vna-form .form-select {
    border-radius: 8px;
    border: 2px solid var(--vna-border);
    padding: 10px 14px;
    transition: var(--transition);
}

.vna-form .form-control:focus,
.vna-form .form-select:focus {
    border-color: var(--vna-secondary);
    box-shadow: 0 0 0 3px rgba(45,106,79,0.15);
}

/* ===== সোশ্যাল বাটন ===== */
.social-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.1rem;
}

.social-btn:hover {
    transform: translateY(-3px);
}

.social-btn.facebook { background: #1877f2; color: white; }
.social-btn.instagram { background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%,#d6249f 60%,#285AEB 90%); color: white; }
.social-btn.youtube { background: #ff0000; color: white; }

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.fade-in-up:nth-child(2) { animation-delay: 0.1s; }
.fade-in-up:nth-child(3) { animation-delay: 0.2s; }
.fade-in-up:nth-child(4) { animation-delay: 0.3s; }

/* ===== মোবাইল রেস্পন্সিভ ===== */
@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0 50px;
        text-align: center;
    }

    .vna-form {
        padding: 25px 20px;
    }

    .stat-card {
        padding: 20px;
    }
}

/* ===== ফুটার ===== */
footer a:hover {
    color: var(--vna-gold) !important;
    text-decoration: none;
}

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

footer a:hover .bi {
    transform: scale(1.2);
}

/* ===== স্ক্রলবার ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: var(--vna-secondary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--vna-primary); }