/* ===== CSS Variables ===== */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --success: #22C55E;
    --warning: #F59E0B;
    --danger: #EF4444;
    --text: #1F2937;
    --text-secondary: #6B7280;
    --background: #F9FAFB;
    --surface: #FFFFFF;
    --border: #E5E7EB;
    --gradient-start: #2563EB;
    --gradient-end: #7C3AED;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--background);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 16px 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s;
}

/* ===== Hero Section ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, #EFF6FF 0%, var(--background) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-content .highlight {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

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

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

.hero-badges {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: var(--surface);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Phone Mockup */
.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: #1F2937;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--background);
    border-radius: 30px;
    overflow: hidden;
}

.app-preview {
    padding: 40px 20px;
    text-align: center;
}

.preview-header {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 16px;
}

.preview-input {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text);
    background: var(--surface);
    padding: 16px;
    border-radius: 16px;
    border: 2px solid var(--primary);
    margin-bottom: 30px;
}

.preview-product {
    background: var(--surface);
    padding: 20px;
    border-radius: 16px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.preview-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.preview-price {
    font-size: 2rem;
    font-weight: 800;
    color: var(--success);
}

.preview-button {
    background: var(--success);
    color: white;
    padding: 16px 40px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--surface);
    padding: 32px 24px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== Screenshots Section ===== */
.screenshots {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--background) 0%, #EFF6FF 100%);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.screenshot-card {
    text-align: center;
}

.screenshot-phone {
    width: 200px;
    height: 400px;
    background: #1F2937;
    border-radius: 30px;
    padding: 8px;
    margin: 0 auto 16px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.screenshot-content {
    width: 100%;
    height: 100%;
    background: var(--background);
    border-radius: 24px;
    padding: 30px 16px;
    overflow: hidden;
}

.ss-header {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
}

.ss-input {
    background: var(--surface);
    padding: 12px;
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    border: 2px solid var(--primary);
}

.ss-btn {
    background: var(--surface);
    padding: 12px;
    border-radius: 10px;
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    border: 2px solid var(--primary);
}

.ss-item {
    background: var(--surface);
    padding: 12px;
    border-radius: 10px;
    font-size: 0.85rem;
    margin-bottom: 8px;
    text-align: left;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.ss-stat {
    padding: 16px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.ss-stat.blue {
    background: #DBEAFE;
    color: var(--primary);
}

.ss-stat.green {
    background: #DCFCE7;
    color: var(--success);
}

.ss-stat.orange {
    background: #FEF3C7;
    color: var(--warning);
}

.ss-menu {
    background: var(--surface);
    padding: 14px;
    border-radius: 10px;
    font-size: 0.85rem;
    margin-bottom: 8px;
    text-align: left;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.screenshot-label {
    font-weight: 600;
    color: var(--text-secondary);
}

/* ===== Download Section ===== */
.download {
    padding: 100px 0;
    text-align: center;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 40px;
}

.store-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    border-radius: 14px;
    background: #000;
    color: white;
    transition: all 0.2s;
}

.store-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.store-icon {
    width: 32px;
    height: 32px;
}

.store-icon svg {
    width: 100%;
    height: 100%;
}

.store-text {
    text-align: left;
}

.store-label {
    display: block;
    font-size: 0.7rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.store-name {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
}

.download-note {
    margin-top: 24px;
    color: var(--text-secondary);
    font-style: italic;
}

/* ===== Footer ===== */
.footer {
    background: #1F2937;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    margin-top: 12px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-brand .logo-text {
    -webkit-text-fill-color: white;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.2s;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-badges {
        justify-content: center;
    }

    .phone-mockup {
        width: 240px;
        height: 480px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links ul {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ===== Page Specific Styles ===== */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(180deg, #EFF6FF 0%, var(--background) 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.page-content {
    padding: 60px 0 100px;
}

.page-content .container {
    max-width: 800px;
}

.page-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
    color: var(--text);
}

.page-content p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.page-content ul {
    margin-bottom: 16px;
    padding-left: 24px;
}

.page-content li {
    margin-bottom: 8px;
    color: var(--text-secondary);
    line-height: 1.8;
    list-style: disc;
}

.page-content a {
    color: var(--primary);
}

.page-content a:hover {
    text-decoration: underline;
}

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 40px;
}

.contact-info {
    background: var(--surface);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.contact-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.contact-item p {
    margin: 0;
    color: var(--text);
}

.contact-item a {
    color: var(--primary);
    font-weight: 500;
}

.contact-form {
    background: var(--surface);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

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

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}