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

:root {
    /* Startup Blue-White Theme */
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --sidebar-bg: #1e293b;
    --primary-blue: #3b82f6;
    --primary-blue-light: #60a5fa;
    --primary-blue-dark: #2563eb;
    --accent-blue: #0ea5e9;
    --main-bg: #f8fafc;
    --text-white: #ffffff;
    --text-gray: #94a3b8;
    --text-dark: #1e293b;
    --card-bg: #1e293b;
    --card-border: #334155;
    --input-bg: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-darker);
    color: var(--text-white);
    min-height: 100vh;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--card-border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--card-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
}

.logo span {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-white);
}

.sidebar-nav {
    padding: 20px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-gray);
    text-decoration: none;
    font-size: 14px;
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 4px;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-item:hover {
    background-color: var(--input-bg);
    color: var(--text-white);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    color: var(--text-white);
}

.nav-item svg {
    stroke: currentColor;
}

.sidebar-section {
    padding: 12px;
    margin-top: 12px;
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0 16px;
    margin-bottom: 12px;
}

.nav-item.secondary {
    font-size: 13px;
    padding: 10px 16px;
}

.user-profile {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    border-top: 1px solid var(--card-border);
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
}

.user-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-white);
}

.user-plan {
    font-size: 12px;
    color: var(--primary-blue-light);
}

.logout-btn {
    background: none;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s;
}

.logout-btn:hover {
    background-color: var(--input-bg);
    color: var(--text-white);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    background-color: var(--main-bg);
    min-height: 100vh;
    padding: 40px;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 40px;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--sidebar-bg) 100%);
    border-radius: 24px;
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 500px;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary-blue-light);
    font-size: 13px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-white);
    line-height: 1.2;
    margin-bottom: 16px;
}

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

.hero-description {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 28px;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    color: var(--text-white);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: 12px;
    transition: all 0.2s;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    padding: 14px 28px;
    border-radius: 12px;
    transition: all 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.hero-visual {
    position: relative;
    width: 350px;
    height: 280px;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-white);
    font-size: 14px;
    font-weight: 500;
    animation: float 4s ease-in-out infinite;
}

.card-icon {
    font-size: 24px;
}

.card-1 {
    top: 20px;
    left: 20px;
    animation-delay: 0s;
}

.card-2 {
    top: 100px;
    right: 20px;
    animation-delay: 1s;
}

.card-3 {
    bottom: 30px;
    left: 60px;
    animation-delay: 2s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
}

.orb-1 {
    width: 150px;
    height: 150px;
    background: var(--primary-blue);
    top: 0;
    right: 50px;
}

.orb-2 {
    width: 100px;
    height: 100px;
    background: var(--accent-blue);
    bottom: 20px;
    left: 100px;
}

.orb-3 {
    width: 80px;
    height: 80px;
    background: #8b5cf6;
    top: 100px;
    left: 0;
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.2s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.stat-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
}

.stat-label {
    font-size: 13px;
    color: var(--text-gray);
}

/* Features Section */
.features-section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    padding: 28px;
    text-decoration: none;
    transition: all 0.25s;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.12);
    border-color: var(--primary-blue);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.feature-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-blue);
}

/* Activity Section */
.activity-section {
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    padding: 28px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: #f8fafc;
    border-radius: 12px;
    transition: all 0.2s;
}

.activity-item:hover {
    background: #f1f5f9;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.activity-icon.chat {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-blue);
}

.activity-icon.prompt {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.activity-icon.model {
    background: rgba(139, 92, 246, 0.1);
    color: #8b5cf6;
}

.activity-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.activity-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.activity-time {
    font-size: 12px;
    color: var(--text-gray);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--main-bg);
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue);
}

/* Responsive - Tablet */
@media (max-width: 1200px) {
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-visual {
        display: none;
    }

    .hero-content {
        max-width: 100%;
    }
}

@media (max-width: 900px) {
    .sidebar {
        width: 220px;
    }

    .main-content {
        margin-left: 220px;
        padding: 24px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero {
        padding: 32px;
    }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: fixed;
        top: 0;
        left: -100%;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
    }

    .sidebar.open {
        left: 0;
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .hero {
        padding: 24px;
        flex-direction: column;
    }

    .hero-title {
        font-size: 28px;
        text-align: center;
    }

    .hero-description {
        text-align: center;
        font-size: 14px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        justify-content: center;
        width: 100%;
    }

    .hero-badge {
        font-size: 12px;
    }

    .stats-section {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
        flex-direction: column;
        text-align: center;
    }

    .stat-number {
        font-size: 24px;
    }

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

    .feature-card {
        padding: 20px;
    }

    .activity-section {
        padding: 20px;
    }

    .activity-item {
        padding: 12px;
    }

    .section-title {
        font-size: 18px;
    }
}

/* Responsive - Small Mobile */
@media (max-width: 480px) {
    .main-content {
        padding: 16px;
    }

    .hero {
        padding: 20px;
    }

    .hero-title {
        font-size: 24px;
    }

    .stats-section {
        grid-template-columns: 1fr;
    }

    .stat-card {
        flex-direction: row;
        text-align: left;
    }

    .activity-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}