:root {
    --primary: #2c3e50;
    --accent: #e67e22;
    --bg: #f4f7f6;
    --text: #333;
    --error: #e74c3c;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    margin: 0; padding: 0;
    color: var(--text);
}

header {
    background: var(--primary);
    color: white;
    text-align: center;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.card {
    background: white;
    margin: 20px;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: bold;
}

.error-msg { color: var(--error); font-size: 0.9rem; margin-bottom: 10px; display: none; }

.bottom-nav {
    position: fixed;
    bottom: 0; width: 100%;
    background: white;
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    border-top: 1px solid #ddd;
    padding-bottom: env(safe-area-inset-bottom);
}

.nav-item { text-align: center; font-size: 0.7rem; color: #777; }
.nav-item img { width: 24px; display: block; margin: 0 auto 4px; }

.hidden { display: none !important; }