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

/* Overlay backdrop */
.auth-modal-overlay {
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at top, rgba(91, 163, 245, 0.12), transparent 32%),
        rgba(3, 6, 14, 0.76);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    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: linear-gradient(180deg, rgba(19, 19, 37, 0.94), rgba(19, 19, 37, 0.88));
    border-radius: 24px;
    box-shadow: 0 28px 80px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.08);
    width: 100%;
    max-width: 460px;
    overflow: hidden;
    animation: slideUp 0.22s ease;
    position: relative;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

@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: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.55rem 1.75rem 0;
}

.auth-modal__header-copy {
    min-width: 0;
}

.auth-modal__eyebrow {
    display: inline-flex;
    align-items: center;
    padding: 0.32rem 0.7rem;
    border-radius: 999px;
    background: rgba(91, 163, 245, 0.12);
    border: 1px solid rgba(91, 163, 245, 0.22);
    color: var(--color-primary-light);
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.85rem;
}

.auth-modal__header h2 {
    font-family: 'Lexend Deca', sans-serif;
    font-size: 1.45rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.03em;
    margin: 0;
}

.auth-modal__header p {
    margin: 0.45rem 0 0;
    color: rgba(255,255,255,0.6);
    font-size: 0.88rem;
    line-height: 1.55;
    max-width: 28rem;
}

/* Close button */
.auth-modal__close {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    cursor: pointer;
    color: rgba(255,255,255,0.72);
    font-size: 1.4rem;
    line-height: 1;
    padding: 0.45rem;
    border-radius: 12px;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.auth-modal__close:hover {
    color: #ffffff;
    background: rgba(91, 163, 245, 0.12);
    border-color: rgba(91, 163, 245, 0.26);
    transform: translateY(-1px);
}

/* Tab switcher inside modal (Login / Sign Up) */
.auth-modal__tabs {
    display: flex;
    margin: 1.1rem 1.75rem 0;
    padding: 0.25rem;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
    border-radius: 16px;
    gap: 0.35rem;
}

.auth-modal__tabs button {
    background: transparent;
    border: none;
    border-radius: 12px;
    padding: 0.72rem 1.1rem;
    font-family: 'Nunito', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.54);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
    flex: 1;
}

.auth-modal__tabs button:hover {
    color: #ffffff;
}

.auth-modal__tabs button.active {
    background: linear-gradient(180deg, rgba(91, 163, 245, 0.16), rgba(91, 163, 245, 0.06));
    color: #ffffff;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

/* Form body */
.auth-modal__body {
    padding: 1.35rem 1.75rem 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.95rem;
}

.auth-modal__body--signup {
    max-height: min(70vh, 540px);
    min-height: 0;
}

.auth-modal__scroll {
    display: flex;
    flex-direction: column;
    gap: 0.95rem;
}

.auth-modal__body--signup .auth-modal__scroll {
    overflow-y: auto;
    max-height: 290px;
    padding-right: 0.35rem;
    scrollbar-gutter: stable;
}

.auth-modal__body--signup .auth-modal__scroll::-webkit-scrollbar {
    width: 7px;
}

.auth-modal__body--signup .auth-modal__scroll::-webkit-scrollbar-track {
    background: transparent;
}

.auth-modal__body--signup .auth-modal__scroll::-webkit-scrollbar-thumb {
    background: rgba(91, 163, 245, 0.28);
    border-radius: 999px;
}

.auth-modal__body--signup .auth-modal__scroll::-webkit-scrollbar-thumb:hover {
    background: rgba(91, 163, 245, 0.42);
}

.auth-modal__body--signup .auth-modal__scroll {
    scrollbar-width: thin;
    scrollbar-color: rgba(91, 163, 245, 0.28) transparent;
}

.auth-modal__intro {
    padding: 0.95rem 1rem;
    border-radius: 16px;
    background: rgba(255,255,255,0.035);
    border: 1px solid rgba(255,255,255,0.07);
    color: rgba(255,255,255,0.62);
    font-size: 0.84rem;
    line-height: 1.55;
}

/* Field group */
.auth-modal__field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    padding: 0.95rem 1rem;
    border-radius: 16px;
    background: rgba(255,255,255,0.025);
    border: 1px solid rgba(255,255,255,0.06);
}

.auth-modal__field label {
    font-family: 'Nunito', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255,255,255,0.58);
}

.auth-modal__field input {
    background: var(--color-background);
    border: 1.5px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    padding: 0.82rem 1rem;
    color: var(--color-on-background);
    font-family: 'Nunito', sans-serif;
    font-size: 0.93rem;
    font-weight: 600;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.auth-modal__field input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.18);
    outline: none;
}

.auth-modal__field input::placeholder {
    color: rgba(255,255,255,0.32);
}

/* Form actions */
.auth-modal__actions {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 0.35rem;
}

.auth-modal__actions .btn {
    width: 100%;
    text-align: center;
    padding: 0.9rem;
    font-size: 0.96rem;
    box-shadow: 0 14px 30px rgba(74, 144, 217, 0.22);
}

/* 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: rgba(255,255,255,0.52);
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255,255,255,0.06);
    margin-top: 0.3rem;
}

.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-light);
    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;
}