:root {
    --bg-body: #f8fafc;
    --text-main: #0f172a;
    --text-secondary: #64748b;
    --accent-color: #4f46e5;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
}

[data-theme="dark"] {
    --bg-body: #0f172a;
    --text-main: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #818cf8;
    --card-bg: #1e293b;
    --border-color: #334155;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

header {
    padding: 4.5rem 1rem 4rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-body);
    position: relative;
}

[data-theme="dark"] header {
    background: linear-gradient(to bottom, rgba(129, 140, 248, 0.04) 0%, var(--card-bg) 100%);
}

.home-logo {
    width: 72px;
    height: 72px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 12px;
    background: var(--card-bg);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 1rem;
    flex-grow: 1;
    width: 100%;
}

h1 {
    font-size: 2.2rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.theme-toggle {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 44px;
    height: 44px;
    font-size: 20px;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    font-family: inherit;
}

.theme-toggle:hover {
    background-color: var(--border-color);
    transform: scale(1.05);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.75rem;
    margin-top: 1rem;
}

.tool-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.75rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -8px rgba(79, 70, 229, 0.25);
    border-color: var(--accent-color);
}

[data-theme="dark"] .tool-card:hover {
    box-shadow: 0 12px 24px -8px rgba(129, 140, 248, 0.15);
}

.tool-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.tool-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: rgba(79, 70, 229, 0.08);
    color: var(--accent-color);
    border-radius: 12px;
    font-size: 1.5rem;
}

[data-theme="dark"] .tool-icon {
    background-color: rgba(129, 140, 248, 0.12);
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

.tool-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    flex-grow: 1;
    margin: 0;
}

.in-progress {
    margin-top: 4rem;
    padding: 2.5rem;
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    text-align: center;
    color: var(--text-secondary);
    background: rgba(79, 70, 229, 0.02);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--accent-color);
    color: white;
    letter-spacing: 0.02em;
}

.caution-badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    background-color: #ef4444;
    color: white;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin: 0 0.5rem;
}

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