/* ===== Reset & Base ===================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: #e2e8f0;
    background: #0f172a;
    line-height: 1.5;
}

/* ===== Utility ========================================= */
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ===== Form elements ==================================== */
.form-error {
    background: rgba(239,68,68,.15);
    border: 1px solid rgba(239,68,68,.4);
    color: #fca5a5;
    border-radius: 8px;
    padding: .625rem .875rem;
    font-size: .8125rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .625rem;
    padding: .875rem 1.25rem;
    border: none;
    border-radius: 12px;
    font-size: .9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s ease;
    letter-spacing: .01em;
    text-decoration: none;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }