/* =========================================
   NRO CAPTCHA SOLVER - PREMIUM ANGULAR UI
   Sharp edges, space theme, fully responsive
   ========================================= */

:root {
    /* Color Palette - Space Theme */
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --secondary: #7c3aed;
    --accent: #f59e0b;

    --bg-space: #0a0e27;
    --bg-surface: #0f1629;
    --bg-card: #1a1f3a;
    --bg-input: #141829;

    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border: #1e293b;
    --border-accent: rgba(0, 212, 255, 0.3);

    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;

    /* Design System */
    --radius-sharp: 0px;
    --radius-slight: 2px;
    --spacing: 8px;

    /* Shadows & Effects */
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-space);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Animated space background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at top, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing);
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .container {
        padding: 0 calc(var(--spacing) * 3);
    }
}

/* ========== TYPOGRAPHY ========== */
h1,
h2,
h3,
h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a:hover {
    color: var(--primary-dark);
}

/* ========== NAVBAR ========== */
.navbar {
    background: rgba(26, 31, 58, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 2) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: calc(var(--spacing) * 2);
}

.logo {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 1.5);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.logo-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 10px var(--primary));
}

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

.nav-link {
    color: var(--text-secondary);
    padding: calc(var(--spacing) * 1.5);
    border: 1px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
}

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

.nav-link:hover::before {
    opacity: 0.1;
}

.nav-balance {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: calc(var(--spacing) * 1.5);
    font-weight: 700;
    font-size: 0.875rem;
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
    box-shadow: var(--shadow-glow);
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: calc(var(--spacing) * 1.5);
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 4);
    font-weight: 700;
    font-size: 0.875rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary);
}

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

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

.btn-sm {
    padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
    font-size: 0.75rem;
}

.btn-lg {
    padding: calc(var(--spacing) * 3) calc(var(--spacing) * 6);
    font-size: 1rem;
}

/* ========== CARDS ========== */
.card {
    background: rgba(26, 31, 58, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 3);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px),
            calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
    background-size: 200% 100%;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing) * 3);
    padding-bottom: calc(var(--spacing) * 2);
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
}

/* ========== FORMS ========== */
.form-group {
    margin-bottom: calc(var(--spacing) * 3);
}

.form-label {
    display: block;
    margin-bottom: calc(var(--spacing) * 1.5);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.form-control {
    width: 100%;
    padding: calc(var(--spacing) * 2);
    background: var(--bg-input);
    border: 2px solid var(--border);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* ========== ALERTS ========== */
.alert {
    padding: calc(var(--spacing) * 2) 0;
    font-weight: 600;
    text-align: center;
    border-left: 4px solid;
    background: rgba(255, 255, 255, 0.05);
}

.alert-success {
    border-color: var(--success);
    color: var(--success);
}

.alert-error {
    border-color: var(--danger);
    color: var(--danger);
}

/* ========== TABLES ========== */
.table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
}

.table th,
.table td {
    padding: calc(var(--spacing) * 2);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    background: rgba(0, 212, 255, 0.1);
    font-weight: 700;
    color: var(--primary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.table tbody tr {
    transition: background 0.2s;
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Responsive table */
@media (max-width: 768px) {
    .table {
        display: block;
        overflow-x: auto;
    }
}

/* ========== HERO ========== */
.hero {
    padding: calc(var(--spacing) * 10) 0;
    text-align: center;
    position: relative;
}

.hero h1 {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: calc(var(--spacing) * 3);
    text-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: calc(var(--spacing) * 4);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== PRICING GRID ========== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing) * 3);
    margin-top: calc(var(--spacing) * 5);
}

.pricing-card {
    background: rgba(26, 31, 58, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 4);
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.3);
}

.pricing-card.featured {
    border-color: var(--primary);
    background: rgba(0, 212, 255, 0.05);
}

.pricing-card.featured::before {
    content: 'PHỔ BIẾN';
    position: absolute;
    top: calc(var(--spacing) * 2);
    right: calc(var(--spacing) * 2);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: calc(var(--spacing) * 0.5) calc(var(--spacing) * 2);
    font-size: 0.625rem;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.pricing-name {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: calc(var(--spacing) * 2);
    text-transform: uppercase;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: calc(var(--spacing) * 3);
}

.pricing-features {
    list-style: none;
    margin-bottom: calc(var(--spacing) * 4);
    text-align: left;
}

.pricing-features li {
    padding: calc(var(--spacing) * 1.5) 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 1.5);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-features li::before {
    content: '▸';
    color: var(--primary);
    font-weight: bold;
    font-size: 1.2em;
}

/* ========== DASHBOARD ========== */
.dashboard {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: calc(100vh - 80px);
    gap: calc(var(--spacing) * 3);
}

@media (max-width: 1024px) {
    .dashboard {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: sticky;
        top: 80px;
    }
}

.sidebar {
    background: rgba(26, 31, 58, 0.4);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 3) 0;
}

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

.sidebar-link {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2);
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
    font-weight: 600;
}

.sidebar-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.sidebar-link:hover,
.sidebar-link.active {
    background: rgba(0, 212, 255, 0.1);
    color: var(--text-primary);
}

.sidebar-link:hover::before,
.sidebar-link.active::before {
    transform: scaleY(1);
}

.dashboard-content {
    padding: calc(var(--spacing) * 4);
}

.dashboard-header {
    margin-bottom: calc(var(--spacing) * 4);
}

.dashboard-title {
    font-size: 2rem;
    font-weight: 800;
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: calc(100vh - 60px);
}

.sidebar {
    width: 250px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    flex-shrink: 0;
}

.dashboard-content {
    flex: 1;
    padding: 30px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.dashboard-header {
    margin-bottom: 30px;
    text-align: center;
}

.dashboard-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Center cards in dashboard */
.card {
    margin-left: auto;
    margin-right: auto;
}

/* ========== STATS GRID ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: calc(var(--spacing) * 3);
    margin-bottom: calc(var(--spacing) * 4);
}

.stat-card {
    background: rgba(26, 31, 58, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 3);
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-bottom: calc(var(--spacing) * 1.5);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
}

.stat-value.success {
    color: var(--success);
}

.stat-value.primary {
    color: var(--primary);
}

/* ========== AUTH PAGES ========== */
.auth-page {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--spacing) * 5);
}

.auth-card {
    background: rgba(26, 31, 58, 0.8);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 6);
    width: 100%;
    max-width: 480px;
    clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
    box-shadow: var(--shadow-card);
}

.auth-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: calc(var(--spacing) * 4);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-footer {
    text-align: center;
    margin-top: calc(var(--spacing) * 3);
    color: var(--text-muted);
}

/* ========== BADGE ========== */
.badge {
    display: inline-block;
    padding: calc(var(--spacing) * 0.5) calc(var(--spacing) * 1.5);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
    border: 1px solid var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border: 1px solid var(--danger);
}

/* ========== FOOTER ========== */
.footer {
    background: rgba(26, 31, 58, 0.6);
    border-top: 1px solid var(--border-accent);
    padding: calc(var(--spacing) * 3) 0;
    margin-top: calc(var(--spacing) * 8);
    text-align: center;
    color: var(--text-muted);
}

/* ========== UTILITIES ========== */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

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

.text-success {
    color: var(--success);
}

.text-danger {
    color: var(--danger);
}

.mt-1 {
    margin-top: calc(var(--spacing) * 1);
}

.mt-2 {
    margin-top: calc(var(--spacing) * 2);
}

.mt-3 {
    margin-top: calc(var(--spacing) * 3);
}

.mb-1 {
    margin-bottom: calc(var(--spacing) * 1);
}

.mb-2 {
    margin-bottom: calc(var(--spacing) * 2);
}

.mb-3 {
    margin-bottom: calc(var(--spacing) * 3);
}

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 {
    gap: calc(var(--spacing) * 1);
}

.gap-2 {
    gap: calc(var(--spacing) * 2);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        width: 100%;
    }

    .nav-link,
    .nav-balance {
        width: 100%;
        text-align: center;
    }

    .dashboard-content {
        padding: calc(var(--spacing) * 2);
    }

    .auth-card {
        padding: calc(var(--spacing) * 4);
    }
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card,
.pricing-card,
.stat-card {
    animation: fadeIn 0.6s ease-out;
}

/* Stagger animation for grids */
.pricing-grid>*:nth-child(1) {
    animation-delay: 0.1s;
}

.pricing-grid>*:nth-child(2) {
    animation-delay: 0.2s;
}

.pricing-grid>*:nth-child(3) {
    animation-delay: 0.3s;
}

.pricing-grid>*:nth-child(4) {
    animation-delay: 0.4s;
}

.pricing-grid>*:nth-child(5) {
    animation-delay: 0.5s;
}