/* Màu sắc thương hiệu VNUA - Cập nhật Modern Palette */
:root {
    --vnua-green: #006241;
    --vnua-green-dark: #004d33;
    --vnua-green-light: #f0fdf4;
    --vnua-gold: #ffcc00;
    --vnua-gold-dark: #e6b800;
    --vnua-text: #1e293b;
    --vnua-muted: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.9);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--vnua-text);
    background-color: #f8fafc;
    line-height: 1.6;
}

/* --- HERO SECTION HIỆN ĐẠI --- */
.hero-section {
    background: linear-gradient(135deg, var(--vnua-green) 0%, var(--vnua-green-dark) 100%);
    padding: 100px 0 140px;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::after {
    content: "";
    position: absolute;
    bottom: -50px;
    left: 0;
    right: 0;
    height: 100px;
    background: #f8fafc;
    transform: skewY(-2deg);
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* --- SEARCH WRAPPER & TABS --- */
.search-wrapper {
    margin-top: -80px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 24px;
    position: relative;
    z-index: 10;
}

.search-tab-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    border: none;
}

.search-tab-nav .nav-link {
    border: 1px solid #e2e8f0 !important;
    border-radius: 50px !important;
    padding: 10px 24px;
    font-weight: 600;
    color: var(--vnua-muted);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: white;
}

.search-tab-nav .nav-link.active {
    background: var(--vnua-green) !important;
    color: white !important;
    border-color: var(--vnua-green) !important;
    box-shadow: 0 10px 15px -3px rgba(0, 98, 65, 0.3);
    transform: translateY(-2px);
}

.search-tab-nav .nav-link:hover:not(.active) {
    border-color: var(--vnua-green) !important;
    color: var(--vnua-green);
    background: var(--vnua-green-light);
}

/* --- INPUTS & BUTTONS --- */
.search-input-group {
    background: white;
    border-radius: 16px;
    padding: 8px 8px 8px 24px;
    border: 2px solid #e2e8f0;
    transition: all 0.3s;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.search-input-group:focus-within {
    border-color: var(--vnua-green);
    box-shadow: 0 0 0 4px rgba(0, 98, 65, 0.1);
}

.btn-search-main {
    background: var(--vnua-green) !important;
    color: white !important;
    border-radius: 12px !important;
    padding: 12px 32px !important;
    font-weight: 700 !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s;
}

.btn-search-main:hover {
    background: var(--vnua-green-dark) !important;
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.form-control-modern {
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 12px 16px;
    transition: all 0.3s;
}

.form-control-modern:focus {
    border-color: var(--vnua-green);
    box-shadow: 0 0 0 4px rgba(0, 98, 65, 0.1);
}