/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --success-color: #4CAF50;
    --info-color: #2196F3;
    --dark-color: #333;
    --light-color: #f5f5f5;
    --white-color: #fff;
    --border-color: #ddd;
    --text-color: #333;
    --text-muted: #666;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    background: var(--light-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== Header Styles ===== */
.main-header {
    background: var(--white-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-top {
    background: var(--dark-color);
    color: var(--white-color);
    padding: 10px 0;
    font-size: 14px;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top-left i,
.header-top-right i {
    margin: 0 5px;
}

.header-top-right a {
    color: var(--white-color);
    text-decoration: none;
    margin: 0 10px;
}

.header-main {
    padding: 15px 0;
}

.header-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo img {
    max-height: 60px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* ===== Notice Banner ===== */
.notice-banner {
    padding: 12px 0;
    text-align: center;
    font-weight: 500;
}

.notice-info { background: var(--info-color); color: var(--white-color); }
.notice-success { background: var(--success-color); color: var(--white-color); }
.notice-warning { background: var(--warning-color); color: var(--white-color); }
.notice-error { background: var(--danger-color); color: var(--white-color); }

/* ===== Hero Slider ===== */
.hero-slider {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.slider-container {
    position: relative;
    height: 100%;
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s;
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    text-align: center;
    color: var(--white-color);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.slide-title {
    font-size: 48px;
    margin-bottom: 20px;
}

.slide-description {
    font-size: 20px;
    margin-bottom: 30px;
}

.slider-controls button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: var(--white-color);
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    font-size: 20px;
    transition: background 0.3s;
}

.slider-controls button:hover {
    background: rgba(0,0,0,0.8);
}

.slider-prev { left: 20px; }
.slider-next { right: 20px; }

.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: background 0.3s;
}

.dot.active,
.dot:hover {
    background: var(--white-color);
}

/* ===== Sections ===== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-muted);
}

section {
    padding: 60px 0;
}

/* ===== Services Grid ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white-color);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.service-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-price {
    font-weight: bold;
    color: var(--primary-color);
    margin: 15px 0;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    text-align: center;
}

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

.btn-primary:hover {
    background: #45a049;
}

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

.btn-secondary:hover {
    background: #1976D2;
}

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

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ===== Alerts ===== */
.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* ===== Login/Register Pages ===== */
.login-container,
.register-container {
    display: flex;
    min-height: 100vh;
}

.banner-slider {
    flex: 1;
    background: var(--primary-color);
}

.login-form-container,
.register-form-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background: var(--white-color);
}

.login-header,
.register-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header .logo,
.register-header .logo {
    max-width: 150px;
    margin-bottom: 20px;
}

.login-form-container form,
.register-form-container form {
    width: 100%;
    max-width: 400px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.register-link,
.login-link {
    text-align: center;
    margin-top: 20px;
}

.back-home {
    text-align: center;
    margin-top: 20px;
}

/* ===== Footer ===== */
.main-footer {
    background: var(--dark-color);
    color: var(--white-color);
}

.footer-top {
    padding: 50px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-col h3 {
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #ccc;
    text-decoration: none;
}

.footer-col a:hover {
    color: var(--white-color);
}

.footer-bottom {
    background: #222;
    padding: 20px 0;
    text-align: center;
}

/* ===== Scroll to Top ===== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white-color);
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 999;
}

.scroll-to-top:hover {
    background: #45a049;
}

/* ===== Popup Alert ===== */
.popup-alert {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.popup-content {
    background: var(--white-color);
    padding: 30px;
    border-radius: 10px;
    max-width: 500px;
    position: relative;
}

.popup-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-4 { margin-top: 40px; }
.mb-4 { margin-bottom: 40px; }
.text-danger { color: var(--danger-color); }
.text-success { color: var(--success-color); }