:root {
    --primary: #112240;
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --bg-light: #f8fafc;
    --text-dark: #0f172a;
    --text-muted: #475569;
    --radius: 8px;
    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
}

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

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
}

.navbar {
    background-color: var(--primary);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.navbar .logo {
    color: #fff;
    font-weight: 700;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.navbar .nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}
.navbar .nav-links a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}
.navbar .nav-links a:hover,
.navbar .nav-links a.active {
    color: var(--accent);
}
.navbar .btn-login {
    background-color: var(--accent);
    color: var(--primary) !important;
    padding: 8px 18px;
    border-radius: var(--radius);
    font-weight: 600;
}
.navbar .btn-login:hover {
    background-color: var(--accent-hover);
}

.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}
.mobile-nav-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
    transition: 0.3s;
}
.mobile-nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-nav-toggle.open span:nth-child(2) { opacity: 0; }
.mobile-nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 80px 20px;
    text-align: center;
}
.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}
.hero h1 span { color: var(--accent); }
.hero p {
    font-size: 1.1rem;
    color: #f8e6c9;
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.6;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}
.btn-hero {
    background-color: var(--accent);
    color: var(--primary);
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 4px 14px rgba(245,158,11,0.4);
}
.btn-hero:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245,158,11,0.6);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}
.about-section {
    text-align: center;
    max-width: 800px;
}
.about-section h1 { font-size: 2.2rem; margin-bottom: 20px; color: var(--primary); }
.about-section p { color: var(--text-muted); font-size: 1rem; margin-bottom: 20px; }

.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 70px);
    padding: 20px;
}
.login-card {
    background: #fff;
    padding: 30px 20px;
    border-radius: var(--radius);
    box-shadow: 0 10px 25px rgba(15,23,42,0.08);
    width: 100%;
    max-width: 420px;
}
.login-logo { text-align: center; margin-bottom: 30px; }
.login-logo i { font-size: 2.5rem; color: var(--accent); margin-bottom: 10px; }
.login-logo h2 { color: var(--primary); font-size: 1.5rem; font-weight: 700; }
.login-logo p { color: var(--gray-400); font-size: 0.9rem; }

.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 0.9rem;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-dark);
    transition: all 0.3s ease;
    background-color: var(--gray-100);
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(245,158,11,0.15);
}
.btn-login-submit {
    width: 100%;
    background-color: var(--primary);
    color: #fff;
    padding: 14px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}
.btn-login-submit:hover { background-color: #1e3a8a; }
.login-error {
    display: none;
    background-color: #fef2f2;
    color: var(--danger);
    padding: 12px;
    border-radius: var(--radius);
    text-align: center;
    font-size: 0.9rem;
    margin-top: 15px;
    border: 1px solid #fca5a5;
}
.login-error.show { display: block; }

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 2000;
}
.toast {
    background: #fff;
    color: var(--text-dark);
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid var(--primary);
    animation: toastIn 0.3s ease forwards;
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.info { border-left-color: var(--accent); }
.toast-out { animation: toastOut 0.3s ease forwards; }
@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}
@keyframes toastOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

@media (max-width: 768px) {
    .navbar { padding: 12px 15px; }
    .navbar .logo { font-size: 1.2rem; }
    .mobile-nav-toggle { display: flex; }
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: var(--primary);
        padding: 20px 0;
        gap: 15px;
        align-items: center;
    }
    .nav-links.active { display: flex; }
    .nav-links a { font-size: 1rem; }
    .navbar .btn-login { padding: 6px 16px; }

    .hero { padding: 60px 15px; }
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }

    .container { padding: 30px 15px; }
    .grid-3, .news-grid { grid-template-columns: 1fr; }
    .price-card, .news-card { padding: 20px; }

    .login-card { padding: 25px 15px; }
    .dashboard-container { padding: 20px 15px; }
    .tabs .tab-btn { font-size: 0.85rem; padding: 8px 15px; }
    .card { padding: 15px; }
    .modal-content { padding: 20px; max-width: 95%; }
    .schedule-grid { flex-direction: column; align-items: center; gap: 8px; }
    .schedule-item { width: 100%; text-align: center; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.6rem; }
    .hero p { font-size: 0.9rem; }
    .btn-hero { padding: 12px 24px; font-size: 0.9rem; }
    .section-title { font-size: 1.5rem; }
    .price-tag { font-size: 1.5rem; }
    .dashboard-container h2 { font-size: 1.2rem; }
    .tab-btn { font-size: 0.75rem; padding: 6px 10px; }
    .card h3 { font-size: 1rem; }
    .card .info { font-size: 0.8rem; }
    .form-group input, .form-group textarea { padding: 10px; }
}

@media (max-width: 360px) {
    .hero { padding: 40px 10px; }
    .hero h1 { font-size: 1.4rem; }
    .container { padding: 20px 10px; }
}