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

body {
    font-family: 'Segoe UI', sans-serif;
    background: #0a0a0a;
    color: #ffffff;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.auth-box {
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 16px;
    padding: 40px;
}

h1 {
    font-size: 28px;
    font-weight: 700;
    color: #00d4aa;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #888;
    margin: 8px 0 24px;
    font-size: 14px;
}

.tabs {
    display: flex;
    margin-bottom: 24px;
    border-bottom: 1px solid #2a2a2a;
}

.tab {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.tab.active {
    color: #00d4aa;
    border-bottom: 2px solid #00d4aa;
}

input {
    width: 100%;
    padding: 12px 16px;
    background: #0a0a0a;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    color: #ffffff;
    font-size: 14px;
    margin-bottom: 12px;
    outline: none;
    transition: border 0.3s;
}

input:focus {
    border-color: #00d4aa;
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: #00d4aa;
    border: none;
    border-radius: 8px;
    color: #0a0a0a;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 8px;
}

.btn-primary:hover {
    background: #00b894;
}

.message {
    margin-top: 16px;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    display: none;
}

.message.error {
    background: #2d1515;
    color: #ff6b6b;
    display: block;
}

.message.success {
    background: #152d25;
    color: #00d4aa;
    display: block;
}

/* Dashboard */
.dashboard {
    max-width: 600px;
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 16px 0;
}

.nav h2 {
    color: #00d4aa;
    font-size: 22px;
}

.logout {
    background: none;
    border: 1px solid #ff6b6b;
    color: #ff6b6b;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
}

.logout:hover {
    background: #ff6b6b;
    color: #0a0a0a;
}

.btn-secondary {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid #00d4aa;
    border-radius: 8px;
    color: #00d4aa;
    cursor: pointer;
    font-size: 14px;
}

.btn-secondary:hover {
    background: #00d4aa;
    color: #0a0a0a;
}