/* ============================================
   OpenService VPN - Premium Landing Page CSS
   Inspired by: Linear, Raycast, Arc Browser
   ============================================ */

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --bg-primary: #09090B;
    --bg-secondary: #111114;
    --accent-primary: #8B5CF6;
    --accent-secondary: #EC4899;
    --text-primary: #FAFAFA;
    --text-secondary: #A1A1AA;
    --border-color: rgba(255, 255, 255, 0.08);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.hidden-test-text {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== HEADER ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 8px;
    position: relative;
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: 6px;
    background: var(--bg-primary);
    border-radius: 4px;
}

.nav-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

/* ===== BUTTONS ===== */
.btn-ghost,
.btn-primary,
.btn-cta,
.btn-copy,
.btn-renew {
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    display: inline-block;
    text-align: center;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-primary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn-cta {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    font-size: 1.125rem;
    padding: 1rem 2.5rem;
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.3);
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 60px rgba(139, 92, 246, 0.5);
}

/* ===== HERO SECTION ===== */
.hero {
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== 3D ABSTRACT VISUAL ===== */
.hero-visual {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.abstract-3d {
    position: relative;
    width: 100%;
    height: 100%;
}

.sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    animation: float 6s ease-in-out infinite;
}

.sphere-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    top: 20%;
    left: 10%;
    opacity: 0.3;
}

.sphere-2 {
    width: 200px;
    height: 200px;
    background: linear-gradient(225deg, var(--accent-secondary), var(--accent-primary));
    bottom: 20%;
    right: 15%;
    opacity: 0.25;
    animation-delay: -3s;
}

.ring {
    position: absolute;
    border: 2px solid;
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.ring-1 {
    width: 400px;
    height: 400px;
    border-color: rgba(139, 92, 246, 0.2);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.ring-2 {
    width: 500px;
    height: 500px;
    border-color: rgba(236, 72, 153, 0.15);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-duration: 30s;
    animation-direction: reverse;
}

.glass-panel {
    position: absolute;
    width: 350px;
    height: 450px;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotateY(20deg) rotateX(10deg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-30px); }
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ===== PRICING SECTION ===== */
.pricing-section {
    padding: var(--spacing-xl) 0;
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: radial-gradient(circle at top, rgba(139, 92, 246, 0.2), transparent);
    pointer-events: none;
}

.pricing-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(236, 72, 153, 0.2));
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.pricing-main {
    margin: var(--spacing-md) 0;
}

.price-big {
    font-size: 5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.price-label {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.pricing-info {
    color: var(--text-secondary);
    margin: var(--spacing-md) 0;
    line-height: 1.8;
}

.pricing-features {
    list-style: none;
    margin: var(--spacing-lg) 0;
    text-align: left;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

.pricing-features svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

/* ===== BENEFITS SECTION ===== */
.benefits-section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.benefit-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: var(--transition-smooth);
}

.benefit-card:hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 20px 60px rgba(139, 92, 246, 0.1);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.benefit-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
    padding: var(--spacing-xl) 0;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0.3;
}

.timeline-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.timeline-number {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.4);
}

.timeline-content {
    padding-top: var(--spacing-sm);
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.timeline-content p {
    color: var(--text-secondary);
}

/* ===== DASHBOARD PREVIEW ===== */
.dashboard-preview {
    padding: var(--spacing-xl) 0;
}

.dashboard-mockup {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.5);
}

.mockup-header {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.mockup-dots {
    display: flex;
    gap: 0.5rem;
}

.mockup-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-secondary);
    opacity: 0.3;
}

.mockup-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
    flex: 1;
}

.mockup-content {
    padding: var(--spacing-lg);
}

.dashboard-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.dashboard-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #10B981;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
    animation: pulse 2s ease-in-out infinite;
}

.status-indicator.inactive {
    background: #EF4444;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.6);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.status-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.card-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.vpn-key {
    font-family: 'Courier New', monospace;
    background: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-copy {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: 0.875rem;
    padding: 0.5rem;
}

.btn-copy:hover {
    background: rgba(255, 255, 255, 0.1);
}

.qr-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.btn-renew {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
}

.btn-renew:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

/* ===== FINAL CTA ===== */
.final-cta {
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.cta-content p {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ===== FOOTER ===== */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-copy {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 968px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }

    .hero-content {
        order: 1;
    }

    .hero-visual {
        order: 2;
        height: 400px;
    }

    .hero-title {
        font-size: clamp(2.5rem, 8vw, 4rem);
    }

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

    .timeline::before {
        left: 30px;
    }

    .timeline-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

@media (max-width: 640px) {
    .nav {
        padding: var(--spacing-xs) 0;
    }

    .nav-actions {
        gap: 0.5rem;
    }

    .btn-ghost,
    .btn-primary {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .hero-title {
        line-height: 1.2;
    }

    .pricing-card {
        padding: var(--spacing-md);
    }

    .price-big {
        font-size: 3.5rem;
    }

    .dashboard-mockup {
        border-radius: var(--radius-sm);
    }

    .mockup-content {
        padding: var(--spacing-sm);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
}

/* ===== PERSONAL CABINET ===== */
.cabinet-container {
    padding: var(--spacing-xl) 0;
    min-height: 100vh;
}

.cabinet-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.user-welcome {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.cabinet-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.cabinet-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    position: sticky;
    top: 100px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-primary);
}

.nav-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-sm) 0;
}

.nav-item.logout {
    color: #ff4d4f;
}

.nav-item.logout:hover {
    background: rgba(255, 77, 79, 0.1);
}

.cabinet-content {
    width: 100%;
}

.tab-pane {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.instructions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.referral-card {
    text-align: center;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(236, 72, 153, 0.05));
    border-color: rgba(139, 92, 246, 0.2);
}

.referral-content {
    margin-bottom: var(--spacing-lg);
}

.referral-link-box {
    background: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.settings-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: left;
}

.form-group label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
}

.btn-delete {
    width: 100%;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    background: transparent;
    color: #ff4d4f;
    border: 1px solid #ff4d4f;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-delete:hover {
    background: #ff4d4f;
    color: white;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.support-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.support-card:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
}

.support-icon {
    font-size: 2rem;
}

@media (max-width: 968px) {
    .cabinet-layout {
        grid-template-columns: 1fr;
    }

    .cabinet-nav {
        flex-direction: row;
        overflow-x: auto;
        position: relative;
        top: 0;
        padding-bottom: var(--spacing-sm);
        gap: var(--spacing-xs);
    }

    .nav-item {
        white-space: nowrap;
        padding: 0.5rem var(--spacing-sm);
    }

    .nav-divider {
        display: none;
    }

    .nav-item.logout {
        margin-left: auto;
    }
}