* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, Arial, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

.app {
    width: min(100% - 32px, 430px);
    margin: 0 auto;
    padding: 48px 0;
}

header {
    margin-bottom: 24px;
}

h1 {
    margin: 0;
    font-size: 28px;
}

.subtitle {
    margin: 8px 0 0;
    color: #94a3b8;
}

.card {
    background: #111827;
    border: 1px solid #1f2937;
    padding: 22px;
    border-radius: 16px;
    box-shadow: 0 12px 35px rgba(0,0,0,.25);
}

h2 {
    margin-top: 0;
    font-size: 19px;
}

input,
button {
    width: 100%;
    padding: 14px;
    margin-top: 12px;
    border-radius: 10px;
    font-size: 16px;
}

input {
    border: 1px solid #374151;
    background: #0b1220;
    color: #fff;
    outline: none;
}

input:focus {
    border-color: #64748b;
}

button {
    border: 0;
    background: #e5e7eb;
    color: #111827;
    font-weight: 700;
    cursor: pointer;
}

button:disabled {
    opacity: .6;
    cursor: wait;
}

.secondary {
    background: transparent;
    color: #94a3b8;
    border: 1px solid #374151;
}

.message {
    min-height: 22px;
    margin-top: 14px;
    color: #cbd5e1;
}

.warning {
    margin-top: 12px;
    color: #fbbf24;
    font-size: 13px;
}

[hidden] {
    display: none !important;
}