/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.header h1 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.header nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.header nav a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.header nav a:hover::before {
    left: 100%;
}

.header nav a:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.header nav a.sign-in {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3);
}

.header nav a.sign-up {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    border: none;
    box-shadow: 0 4px 15px rgba(255,107,107,0.4);
}

.header nav a.sign-up:hover {
    background: linear-gradient(135deg, #ee5a24 0%, #ff6b6b 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255,107,107,0.6);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 80px;
    overflow: hidden;
}

.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.8) 0%, rgba(52, 73, 94, 0.9) 100%);
    z-index: -1;
}

.left-container {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.intro-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    line-height: 1.2;
}

.intro-prgh {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: #ecf0f1;
    font-weight: 300;
    line-height: 1.8;
}

.btn-warning {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    border: none;
    color: white;
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(255,107,107,0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #ee5a24 0%, #ff6b6b 100%);
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255,107,107,0.6);
}

/* Features Section */
.features-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 50%);
}

.features-section h2 {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 4rem;
    color: #2c3e50;
    position: relative;
}

.features-section h2::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #ff6b6b, #feca57);
    border-radius: 2px;
}

.feature-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    margin: 1rem;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.05);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,107,107,0.05) 0%, rgba(254,202,87,0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: 4rem;
    color: #ff6b6b;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    display: inline-block;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    color: #ee5a24;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.feature-description {
    color: #7f8c8d;
    line-height: 1.7;
    font-size: 1rem;
}

/* About Us Section */
.about-us-section {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.about-us-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('css/image/frame 174.png') no-repeat center center;
    background-size: cover;
    opacity: 0.1;
    z-index: 1;
}

.margin {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    position: relative;
    z-index: 2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #ff6b6b, #feca57);
    margin: 0 auto 4rem auto;
    border: none;
    border-radius: 2px;
    position: relative;
    z-index: 2;
}

.about-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.about-us-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    transition: all 0.3s ease;
}

.about-us-item:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.15);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.about-us-item p {
    font-size: 1.3rem;
    margin: 2rem 0;
    font-weight: 500;
    line-height: 1.6;
}

.about-us-section .img-fixed-size {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    border: 3px solid rgba(255,255,255,0.3);
}

.about-us-item:hover .img-fixed-size {
    transform: scale(1.05);
    box-shadow: 0 25px 50px rgba(0,0,0,0.4);
}

/* Modal Styles */
.modal-content {
    border-radius: 20px;
    border: none;
    box-shadow: 0 25px 50px rgba(0,0,0,0.2);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    border-bottom: none;
    padding: 2rem;
}

.modal-title {
    font-weight: 600;
    font-size: 1.5rem;
}

.modal-body {
    padding: 2rem;
}

.form-label {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 0.8rem 1rem;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: #ff6b6b;
    box-shadow: 0 0 0 0.2rem rgba(255,107,107,0.25);
    outline: none;
}

.modal-body .btn {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    border: none;
    color: white;
    padding: 1rem 2rem;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 1rem;
}

.modal-body .btn:hover {
    background: linear-gradient(135deg, #ee5a24 0%, #ff6b6b 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255,107,107,0.4);
}

.sign-in-footer a, .sign-up-footer a {
    color: #ff6b6b;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.sign-in-footer a:hover, .sign-up-footer a:hover {
    color: #ee5a24;
}

/* Responsive Images */
img {
    max-width: 100%;
    height: auto;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #ff6b6b, #feca57);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #ee5a24, #ff6b6b);
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* Apply animations */
.intro-title {
    animation: fadeInUp 1s ease-out;
}

.intro-prgh {
    animation: fadeInUp 1s ease-out 0.3s both;
}

.btn-warning {
    animation: fadeInUp 1s ease-out 0.6s both;
}

.feature-card {
    animation: slideInLeft 0.8s ease-out;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.4s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.6s;
}

.about-us-item {
    animation: fadeInUp 0.8s ease-out;
}

.about-us-item:nth-child(2) {
    animation-delay: 0.2s;
}

.about-us-item:nth-child(3) {
    animation-delay: 0.4s;
}

/* Hover effects for images */
.about-us-section .img-fixed-size:hover {
    animation: pulse 2s infinite;
}

/* Enhanced button hover effects */
.btn-warning {
    position: relative;
    overflow: hidden;
}

.btn-warning::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn-warning:hover::before {
    left: 100%;
}

/* Enhanced feature card hover */
.feature-card:hover .feature-icon {
    animation: pulse 1s infinite;
}

/* Smooth transitions for all interactive elements */
.header nav a,
.btn-warning,
.feature-card,
.about-us-item,
.modal-body .btn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}