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

:root {
    --bg: #fff;
    --fg: #202124;
    --accent: #1a73e8;
    --accent-blue: #4285f4;
    --accent-red: #db4437;
    --accent-yellow: #f4b400;
    --accent-green: #0f9d58;
    --muted: #5f6368;
    --card: #f8f9fa;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(60, 64, 67, 0.2);
    font-family: 'Roboto', system-ui, sans-serif;
}

html[data-theme="dark"] {
    --bg: #0e0f11;
    --fg: #f1f3f4;
    --accent: #8ab4f8;
    --accent-blue: #8ab4f8;
    --accent-red: #f28b82;
    --accent-yellow: #fdd663;
    --accent-green: #81c995;
    --muted: #9aa0a6;
    --card: #1f2022;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

html,
body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
    scroll-behavior: smooth;
}

header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--card);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.3s;
}

main {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    box-sizing: border-box;
    background-image: linear-gradient(135deg, #e3f2fd 0%, #ffffff 100%);
    transition: background 0.3s;
    text-align: center;
}

main h1 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.search-form {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 2rem;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.search-form input {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 9999px;
    font-size: 1rem;
    width: min(100%, 480px);
    background: var(--card);
    color: var(--fg);
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s, background-color 0.2s;
}

.search-form input:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--accent);
    background-color: var(--bg);
}

.search-form button {
    border: none;
    background-color: var(--accent);
    color: #fff;
    padding: 0.75rem 1.25rem;
    border-radius: 9999px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: background-color 0.2s, box-shadow 0.2s;
}

.search-form button:hover {
    background-color: #1669c1;
    box-shadow: 0 4px 12px rgba(60, 64, 67, 0.3);
}

.search-form button .material-icons {
    font-size: 20px;
    margin: 0;
    vertical-align: middle;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    cursor: pointer;
}

.logo span {
    transition: color 0.4s ease-in-out, transform 0.3s ease;
    display: inline-block;
}

.logo:hover span {
    animation: wave 0.6s forwards;
}

@keyframes wave {
    0% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
    100% { transform: translateY(0); }
}

.logo:hover span:nth-child(1) { color: var(--accent-blue); }
.logo:hover span:nth-child(2) { color: var(--accent-red); }
.logo:hover span:nth-child(3) { color: var(--accent-yellow); }
.logo:hover span:nth-child(4) { color: var(--accent-blue); }
.logo:hover span:nth-child(5) { color: var(--accent-green); }
.logo:hover span:nth-child(6) { color: var(--accent-red); }

.header-buttons {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle,
.app-launcher-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--accent);
}

footer {
    flex-shrink: 0;
    background: var(--card);
    text-align: center;
    padding: 1rem 2rem;
    font-size: 0.85rem;
    color: var(--muted);
    transition: background 0.3s;
}

html[data-theme="dark"] main {
    background-image: linear-gradient(135deg, #1c1f26 0%, #0e0f11 100%);
}

html[data-theme="dark"] .faq details {
    background: var(--card);
    box-shadow: var(--shadow);
}

html[data-theme="dark"] .faq details:hover {
    background-color: var(--accent-blue);
    box-shadow: 0 4px 12px rgba(138, 180, 248, 0.5);
    color: #fff;
}