:root {
    --bg-color: #0a0e17;
    --card-bg: #151a25;
    --primary-color: #00d4ff;
    --secondary-color: #7000ff;
    --text-color: #e0e6ed;
    --text-muted: #94a3b8;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7000ff 100%);
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3 {
    color: #fff;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.btn {
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: url('../images/hero_bg.png') no-repeat center center/cover;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 23, 0.7);
    /* Dark overlay */
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    line-height: 1.1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* Features Section */
.features {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-card h3 {
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-muted);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    width: 100%;
    max-width: 400px;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-family: inherit;
}

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

.form-footer {
    margin-top: 20px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-footer a {
    color: var(--primary-color);
    cursor: pointer;
}

.alert {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: none;
}

.alert-error {
    background: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.alert-success {
    background: rgba(52, 199, 89, 0.1);
    color: #34c759;
    border: 1px solid rgba(52, 199, 89, 0.2);
}

/* Checkbox */
.checkbox-group {
    margin-bottom: 15px;
}

.checkbox-container {
    display: block;
    position: relative;
    padding-left: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-muted);
    user-select: none;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.checkbox-container:hover input~.checkmark {
    background-color: rgba(255, 255, 255, 0.2);
}

.checkbox-container input:checked~.checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked~.checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 7px;
    top: 3px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Profile Dropdown */
.profile-menu {
    position: relative;
}

.profile-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 8px 15px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.profile-trigger:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.profile-trigger i.fa-user-circle {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.dropdown-menu {
    position: absolute;
    top: 120%;
    right: 0;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 10px;
    min-width: 200px;
    display: none;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 1001;
}

.dropdown-menu.active {
    display: flex;
}

.dropdown-menu a {
    padding: 10px 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-color);
    font-size: 0.95rem;
}

.dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--primary-color);
}

.dropdown-menu .divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 5px 0;
}

/* Profile Modal Info */
.profile-info {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item .label {
    color: var(--text-muted);
}

.info-item .value {
    font-weight: 600;
}

.badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(0, 212, 255, 0.2);
    text-transform: uppercase;
}

.profile-actions h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
}

.text-muted {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }
}