/* =========================
   Auth Modal – Login / Sign Up
   Pure front-end UI, no backend
========================= */

/* Overlay backdrop */
.auth-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Modal card */
.auth-modal {
    background: var(--color-background-card);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0,0,0,0.35), 0 0 0 1px var(--color-border);
    width: 100%;
    max-width: 420px;
    overflow: hidden;
    animation: slideUp 0.22s ease;
    position: relative;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(24px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Top accent stripe */
.auth-modal::before {
    content: '';
    display: block;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary), var(--color-primary-light));
}

/* Header bar */
.auth-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.4rem 1.75rem 0;
}

.auth-modal__header h2 {
    font-family: 'Lexend Deca', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-on-background);
    letter-spacing: -0.02em;
}

/* Close button */
.auth-modal__close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-on-background-muted);
    font-size: 1.4rem;
    line-height: 1;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.auth-modal__close:hover {
    color: var(--color-on-background);
    background: var(--color-background-hover);
}

/* Tab switcher inside modal (Login / Sign Up) */
.auth-modal__tabs {
    display: flex;
    margin: 1rem 1.75rem 0;
    border-bottom: 2px solid var(--color-border);
    gap: 0;
}

.auth-modal__tabs button {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    padding: 0.6rem 1.1rem;
    font-family: 'Nunito', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-on-background-muted);
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.auth-modal__tabs button:hover {
    color: var(--color-on-background);
}

.auth-modal__tabs button.active {
    border-bottom-color: var(--color-primary);
    color: var(--color-primary);
}

/* Form body */
.auth-modal__body {
    padding: 1.5rem 1.75rem 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Field group */
.auth-modal__field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.auth-modal__field label {
    font-family: 'Nunito', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-on-background-muted);
}

.auth-modal__field input {
    /* Inherits global input styles from main.css */
}

/* Form actions */
.auth-modal__actions {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 0.5rem;
}

.auth-modal__actions .btn {
    width: 100%;
    text-align: center;
    padding: 0.75rem;
    font-size: 0.95rem;
}

/* Divider */
.auth-modal__divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-on-background-muted);
    font-size: 0.8rem;
    font-family: 'Nunito', sans-serif;
    margin: 0.25rem 0;
}

.auth-modal__divider::before,
.auth-modal__divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* Footer link */
.auth-modal__footer {
    text-align: center;
    font-family: 'Nunito', sans-serif;
    font-size: 0.82rem;
    color: var(--color-on-background-muted);
    padding-top: 0.25rem;
}

.auth-modal__footer a,
.auth-modal__footer button.link {
    background: none;
    border: none;
    padding: 0;
    color: var(--color-primary);
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    font-size: inherit;
    font-family: inherit;
    transition: color var(--transition-fast);
}

.auth-modal__footer a:hover,
.auth-modal__footer button.link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Error message inside form */
.auth-modal__error {
    background: rgba(229, 62, 62, 0.1);
    border: 1px solid rgba(229, 62, 62, 0.35);
    color: var(--color-error);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.9rem;
    font-size: 0.85rem;
    font-family: 'Nunito', sans-serif;
}