/* ========================================
   A2Z Software Selling Platform - CSS
   Modern & Professional Design
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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

.section-padding {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

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

.btn-accent:hover {
    background: #d97706;
    transform: translateY(-2px);
}

/* ========================================
   HEADER STYLES
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    padding: 10px 0;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo span {
    color: var(--secondary-color);
}

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

.nav-link {
    font-weight: 500;
    color: var(--secondary-color);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    padding-top: 150px;
    padding-bottom: 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    background-size: 50px 50px;
    animation: float 20s linear infinite;
}

@keyframes float {
    0% { transform: translateY(0); }
    100% { transform: translateY(-50px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.hero-image {
    margin-top: 60px;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features {
    background: var(--light-bg);
}

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

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: var(--white);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

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

/* ========================================
   SCREENSHOTS SECTION
   ======================================== */
.screenshots {
    background: var(--white);
}

.screenshot-slider {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
}

.screenshot-track {
    display: flex;
    transition: transform 0.5s ease;
}

.screenshot-item {
    min-width: 100%;
    padding: 20px;
    background: var(--light-bg);
}

.screenshot-item img {
    width: 100%;
    border-radius: 10px;
    max-height: 500px;
    object-fit: cover;
}

.slider-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.slider-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.slider-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

/* ========================================
   PRICING SECTION
   ======================================== */
.pricing {
    background: var(--light-bg);
}

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

.pricing-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 3px solid var(--primary-color);
}

.pricing-card.featured::before {
    content: 'Popular';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.pricing-price span {
    font-size: 1rem;
    color: var(--text-gray);
    font-weight: 400;
}

.pricing-features {
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    padding: 10px 0;
    color: var(--text-gray);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* ========================================
   DOWNLOAD SECTION
   ======================================== */
.download {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
}

.download .section-title h2,
.download .section-title p {
    color: var(--white);
}

.download-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary-color);
}

.form-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-submit {
    width: 100%;
    padding: 16px;
    background: var(--accent-color);
    color: var(--secondary-color);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.form-submit:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    display: none;
}

.form-message.success {
    display: block;
    background: #d1fae5;
    color: #065f46;
}

.form-message.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */
.testimonials {
    background: var(--light-bg);
}

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

.testimonial-card {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-text {
    font-size: 1.05rem;
    color: var(--text-gray);
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 1.2rem;
}

.author-info h4 {
    font-size: 1rem;
    color: var(--secondary-color);
}

.author-info span {
    font-size: 0.85rem;
    color: var(--text-gray);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--primary-light);
}

.footer-section p {
    color: #94a3b8;
    line-height: 1.8;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: #94a3b8;
}

.footer-section ul li a:hover {
    color: var(--primary-light);
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #94a3b8;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
}

/* ========================================
   POPUP STYLES
   ======================================== */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.popup-overlay.active {
    display: flex;
}

.popup-content {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    max-width: 500px;
    width: 100%;
    text-align: center;
    position: relative;
    animation: popupSlide 0.3s ease;
}

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

.popup-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-gray);
}

.popup-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.popup-content p {
    color: var(--text-gray);
    margin-bottom: 25px;
}

/* ========================================
   ADMIN STYLES
   ======================================== */
.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary-color), #1e3a5f);
}

.login-box {
    background: var(--white);
    padding: 50px;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.admin-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 260px;
    background: var(--secondary-color);
    color: var(--white);
    padding: 20px;
    z-index: 100;
}

.admin-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-menu {
    list-style: none;
}

.admin-menu li {
    margin-bottom: 10px;
}

.admin-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    border-radius: 8px;
    color: #94a3b8;
    transition: var(--transition);
}

.admin-menu a:hover,
.admin-menu a.active {
    background: var(--primary-color);
    color: var(--white);
}

.admin-main {
    margin-left: 260px;
    padding: 30px;
    min-height: 100vh;
    background: var(--light-bg);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    background: var(--white);
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.admin-card {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
}

.admin-card h3 {
    margin-bottom: 20px;
    color: var(--secondary-color);
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--light-bg);
    font-weight: 600;
    color: var(--secondary-color);
}

.data-table tr:hover {
    background: var(--light-bg);
}

/* Form Styles */
.admin-form .form-group {
    margin-bottom: 20px;
}

.admin-form input,
.admin-form textarea,
.admin-form select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

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

.admin-form textarea {
    min-height: 120px;
    resize: vertical;
}

/* Buttons */
.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

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

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

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

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-card h4 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-card p {
    color: var(--text-gray);
}

/* ========================================
   RESPONSIVE STYLES
   ======================================== */
@media (max-width: 991px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-10px);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        box-shadow: var(--shadow);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.7rem;
    }
    
    .pricing-price {
        font-size: 2rem;
    }
    
    .download-form {
        padding: 25px;
    }
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}