:root {
    --bg-dark: #0a0a0f;
    --card-bg: #14141f;
    --yellow: #f5b042;
    --violet: #a855f7;
    --text-light: #e2e2e6;
    --text-dim: #8a8a9a;
    --border: #2a2a35;
    --error: #ff6b6b;
    --success: #4ade80;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
}

/* Login page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 20% 30%, #1a1025, var(--bg-dark));
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
    border: 1px solid var(--border);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--yellow), var(--violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.login-card label {
    display: block;
    margin-top: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.login-card input {
    width: 100%;
    padding: 0.75rem;
    background: #1e1e2a;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-light);
    font-size: 1rem;
    outline: none;
    transition: 0.2s;
}

.login-card input:focus {
    border-color: var(--violet);
    box-shadow: 0 0 0 2px rgba(168,85,247,0.2);
}

.login-card button {
    width: 100%;
    margin-top: 1.5rem;
    padding: 0.75rem;
    background: linear-gradient(90deg, var(--yellow), var(--violet));
    border: none;
    border-radius: 40px;
    font-weight: bold;
    font-size: 1rem;
    color: #0a0a0f;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
}

.login-card button:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.error {
    background: rgba(255,107,107,0.2);
    border-left: 3px solid var(--error);
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Hub main layout */
.hub-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.hub-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--yellow), var(--violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
    padding: 0.25rem 0;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--yellow);
    border-bottom: 2px solid var(--yellow);
}

/* Apps grid */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.app-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 1.5rem;
    text-align: center;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    color: var(--text-light);
}

.app-icon img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.app-card:hover {
    transform: translateY(-4px);
    border-color: var(--violet);
    box-shadow: 0 12px 20px rgba(0,0,0,0.3);
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 0.75rem;
}

.app-name {
    font-weight: bold;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.app-desc {
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* Account and settings panels */
.account-panel, .settings-panel {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto;
    border: 1px solid var(--border);
}

.account-panel h2, .settings-panel h2 {
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.account-panel label, .setting-item label {
    display: block;
    margin-top: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-dim);
}

.account-panel input {
    width: 100%;
    padding: 0.75rem;
    background: #1e1e2a;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-light);
}

.account-panel button, .settings-panel button {
    margin-top: 1.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(90deg, var(--yellow), var(--violet));
    border: none;
    border-radius: 40px;
    font-weight: bold;
    cursor: pointer;
}

.setting-item {
    margin: 1rem 0;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.app-icon-small {
    font-size: 1.2rem;
}

.msg {
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.msg.success {
    background: rgba(74,222,128,0.2);
    border-left: 3px solid var(--success);
}

.msg.error {
    background: rgba(255,107,107,0.2);
    border-left: 3px solid var(--error);
}