@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Default Dark Theme Variables */
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --surface-dark: #0f172a;
    --surface-card: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --card-hover: #334155;
    --border-active: #00d4ff;
    --border-color: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --bg-header: rgba(0, 0, 0, 0.4);
    --header-border: rgba(255, 255, 255, 0.1);
    --heading-gradient-start: #00d4ff;
    --heading-gradient-end: #7c3aed;
    --btn-gradient-start: #7c3aed;
    --btn-gradient-end: #6366f1;
    --btn-shadow: rgba(124, 58, 237, 0.4);
}

[data-theme="light"] {
    --surface-dark: #f0f2f5;
    --surface-card: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #64748b;
    --card-hover: #e2e8f0;

    --bg-header: rgba(255, 255, 255, 0.8);
    --header-border: rgba(0, 0, 0, 0.1);
    --heading-gradient-start: #0080ff;
    --heading-gradient-end: #6020a0;
    --btn-gradient-start: #6020a0;
    --btn-gradient-end: #4f46e5;
    --btn-shadow: rgba(99, 102, 241, 0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--surface-dark);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.app {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
}

.app-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-header);
    border-bottom: 1px solid var(--header-border);
    backdrop-filter: blur(8px);
    transition: background 0.3s ease, border-color 0.3s ease;
    flex-shrink: 0;
}

.app-header h1 {
    font-size: 20px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    background: linear-gradient(135deg, var(--heading-gradient-start), var(--heading-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    padding: 0;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-controls button {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end));
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
}

.header-controls button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--btn-shadow);
}

.main-area {
    flex: 1;
    overflow-y: auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    max-width: 1200px;
    width: 90%;
    padding: 2rem;
    text-align: center;
}

header {
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease-out;
}

.container header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
    font-family: 'Outfit', sans-serif;
}

p.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
}

.card {
    background-color: var(--surface-card);
    border-radius: 1.5rem;
    padding: 2.5rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

[data-theme="light"] .card {
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .card:hover {
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.1);
    border-color: rgba(0, 0, 0, 0.1);
}

.card:hover::before {
    opacity: 0.05;
}

.card-content {
    position: relative;
    z-index: 1;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.card h2 {
    font-size: 1.75rem;
    margin: 0 0 1rem 0;
    font-weight: 600;
}

.card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: 1rem;
}

.card-arrow {
    margin-top: 2rem;
    font-weight: 500;
    color: #a855f7;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.card:hover .card-arrow {
    gap: 1rem;
    color: #c084fc;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

@media (max-width: 768px) {
    .container header h1 {
        font-size: 2.5rem;
    }

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

/* Focus Styles */
.card {
    outline: none;
}

.card:focus,
.card:active {
    border-color: var(--border-active);
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
    transform: translateY(-8px);
}

.card:focus::before {
    opacity: 0.05;
}

/* Footer / Bottom Bar */
footer {
    width: 100%;
    padding: 8px 16px;
    background: var(--surface-dark);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    flex-shrink: 0;
}

.footer-content {
    color: var(--border-active);
    font-weight: 500;
}