/*
 * Authentication screens.
 * A split showcase: branded panel on one side, frosted form card on the other.
 */

:root {
    --au-ink: #0b1020;
    --au-surface: rgba(255, 255, 255, 0.82);
    --au-border: rgba(15, 23, 42, 0.1);
    --au-text: #0f172a;
    --au-muted: #64748b;
    --au-field: rgba(255, 255, 255, 0.75);
    --au-field-border: rgba(15, 23, 42, 0.14);
    --au-c1: #6366f1;
    --au-c2: #a855f7;
    --au-c3: #06b6d4;
    --au-c4: #f43f5e;
}

[data-bs-theme="dark"] {
    --au-surface: rgba(17, 20, 30, 0.78);
    --au-border: rgba(255, 255, 255, 0.09);
    --au-text: #f1f5f9;
    --au-muted: #94a3b8;
    --au-field: rgba(255, 255, 255, 0.04);
    --au-field-border: rgba(255, 255, 255, 0.12);
    --au-c1: #818cf8;
    --au-c2: #c084fc;
    --au-c3: #22d3ee;
    --au-c4: #fb7185;
}

.au {
    position: relative;
    display: flex;
    min-height: 100vh;
    overflow: hidden;
    background-color: #f4f5fb;
    color: var(--au-text);
}

[data-bs-theme="dark"] .au {
    background-color: #070912;
}

/* -------------------------------------------------------------------------- */
/* Ambient background                                                         */
/* -------------------------------------------------------------------------- */

.au__glow {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.au-blob {
    position: absolute;
    width: 42rem;
    height: 42rem;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
    will-change: transform;
}

[data-bs-theme="dark"] .au-blob {
    opacity: 0.38;
}

.au-blob--1 {
    top: -16rem;
    inset-inline-start: -12rem;
    background: radial-gradient(circle, var(--au-c1), transparent 66%);
    animation: au-drift-a 22s ease-in-out infinite;
}

.au-blob--2 {
    bottom: -20rem;
    inset-inline-start: 14%;
    background: radial-gradient(circle, var(--au-c2), transparent 66%);
    animation: au-drift-b 27s ease-in-out infinite;
}

.au-blob--3 {
    top: 8%;
    inset-inline-end: -16rem;
    background: radial-gradient(circle, var(--au-c3), transparent 66%);
    animation: au-drift-c 31s ease-in-out infinite;
}

@keyframes au-drift-a {
    0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
    50%      { transform: translate3d(6rem, 4rem, 0) scale(1.12); }
}

@keyframes au-drift-b {
    0%, 100% { transform: translate3d(0, 0, 0) scale(1.05); }
    50%      { transform: translate3d(-5rem, -6rem, 0) scale(0.92); }
}

@keyframes au-drift-c {
    0%, 100% { transform: translate3d(0, 0, 0) scale(0.95); }
    50%      { transform: translate3d(-4rem, 7rem, 0) scale(1.1); }
}

/* A faint grid so the gradients have something to sit against. */
.au__grid {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, rgba(15, 23, 42, 0.055) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(15, 23, 42, 0.055) 1px, transparent 1px);
    background-size: 3.25rem 3.25rem;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, #000 30%, transparent 100%);
}

[data-bs-theme="dark"] .au__grid {
    background-image:
        linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
}

@media (prefers-reduced-motion: reduce) {
    .au-blob {
        animation: none;
    }
}

/* -------------------------------------------------------------------------- */
/* Brand panel                                                                */
/* -------------------------------------------------------------------------- */

.au__aside {
    position: relative;
    z-index: 1;
    display: none;
    flex: 1 1 52%;
    flex-direction: column;
    justify-content: space-between;
    gap: 2rem;
    padding: 3rem;
}

@media (min-width: 992px) {
    .au__aside {
        display: flex;
    }
}

.au-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.0625rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    color: var(--au-text);
    text-decoration: none;
}

.au-brand__mark {
    display: grid;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    flex: 0 0 auto;
    border-radius: 0.75rem;
    background: linear-gradient(140deg, var(--au-c2), var(--au-c1));
    box-shadow: 0 10px 22px -10px var(--au-c1);
    color: #fff;
}

.au-brand__mark svg {
    width: 1.25rem;
    height: 1.25rem;
    fill: currentColor;
}

.au-hero {
    max-width: 34rem;
}

.au-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.75rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--au-border);
    border-radius: 999px;
    background-color: var(--au-surface);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--au-muted);
}

.au-hero__title {
    margin: 0 0 1rem;
    font-size: clamp(2rem, 3.2vw, 2.875rem);
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: -0.035em;
}

.au-hero__title em {
    font-style: normal;
    background: linear-gradient(100deg, var(--au-c1), var(--au-c2) 45%, var(--au-c3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.au-hero__text {
    margin: 0;
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--au-muted);
}

.au-features {
    display: grid;
    gap: 0.875rem;
    margin: 2rem 0 0;
    padding: 0;
    list-style: none;
}

.au-feature {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1rem;
    border: 1px solid var(--au-border);
    border-radius: 0.875rem;
    background-color: var(--au-surface);
    backdrop-filter: blur(12px);
}

.au-feature__icon {
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    flex: 0 0 auto;
    border-radius: 0.625rem;
    color: #fff;
    font-size: 0.95rem;
}

.au-feature:nth-child(1) .au-feature__icon { background: linear-gradient(140deg, var(--au-c2), var(--au-c1)); }
.au-feature:nth-child(2) .au-feature__icon { background: linear-gradient(140deg, var(--au-c3), #0ea5e9); }
.au-feature:nth-child(3) .au-feature__icon { background: linear-gradient(140deg, #34d399, #10b981); }

.au-feature__title {
    display: block;
    font-size: 0.875rem;
    font-weight: 650;
}

.au-feature__text {
    display: block;
    font-size: 0.8125rem;
    color: var(--au-muted);
}

.au-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.au-stat__value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(120deg, var(--au-c1), var(--au-c2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.au-stat__label {
    display: block;
    font-size: 0.75rem;
    color: var(--au-muted);
}

/* -------------------------------------------------------------------------- */
/* Form side                                                                  */
/* -------------------------------------------------------------------------- */

.au__main {
    position: relative;
    z-index: 1;
    display: flex;
    flex: 1 1 48%;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.au-card {
    width: 100%;
    max-width: 25rem;
    padding: 2rem;
    border: 1px solid var(--au-border);
    border-radius: 1.25rem;
    background-color: var(--au-surface);
    backdrop-filter: blur(20px);
    box-shadow: 0 24px 60px -24px rgba(15, 23, 42, 0.28);
}

[data-bs-theme="dark"] .au-card {
    box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.85);
}

@media (min-width: 576px) {
    .au-card {
        padding: 2.5rem;
    }
}

.au-card__head {
    margin-bottom: 1.75rem;
    text-align: center;
}

.au-card__title {
    margin: 0 0 0.35rem;
    font-size: 1.5rem;
    font-weight: 750;
    letter-spacing: -0.025em;
}

.au-card__text {
    margin: 0;
    font-size: 0.875rem;
    color: var(--au-muted);
}

/* Floating-label field */

.au-field {
    position: relative;
    margin-bottom: 1rem;
}

.au-field__input {
    width: 100%;
    padding: 1.35rem 0.9rem 0.5rem;
    border: 1px solid var(--au-field-border);
    border-radius: 0.75rem;
    background-color: var(--au-field);
    color: var(--au-text);
    font-size: 0.9375rem;
    line-height: 1.3;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    appearance: none;
}

.au-field__input::placeholder {
    color: transparent;
}

.au-field__input:focus {
    outline: none;
    border-color: var(--au-c1);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--au-c1) 18%, transparent);
}

.au-field__label {
    position: absolute;
    top: 0.95rem;
    inset-inline-start: 0.95rem;
    font-size: 0.9375rem;
    color: var(--au-muted);
    pointer-events: none;
    transform-origin: inset-inline-start top;
    transition: transform 0.14s ease, color 0.14s ease;
}

.au-field__input:focus + .au-field__label,
.au-field__input:not(:placeholder-shown) + .au-field__label {
    transform: translateY(-0.6rem) scale(0.75);
    color: var(--au-c1);
}

[dir="rtl"] .au-field__label {
    transform-origin: right top;
}

.au-field--has-toggle .au-field__input {
    padding-inline-end: 3rem;
}

.au-field__toggle {
    position: absolute;
    top: 50%;
    inset-inline-end: 0.35rem;
    transform: translateY(-50%);
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border: none;
    border-radius: 0.5rem;
    background: none;
    color: var(--au-muted);
}

.au-field__toggle:hover {
    color: var(--au-text);
    background-color: color-mix(in srgb, var(--au-muted) 12%, transparent);
}

.au-field__error {
    display: block;
    margin-top: 0.35rem;
    font-size: 0.75rem;
    font-weight: 550;
    color: var(--au-c4);
}

.au-field--invalid .au-field__input {
    border-color: var(--au-c4);
}

.au-field--invalid .au-field__input:focus {
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--au-c4) 18%, transparent);
}

/* Buttons */

.au-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 0.75rem;
    background: linear-gradient(100deg, var(--au-c1), var(--au-c2));
    background-size: 160% 100%;
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 650;
    box-shadow: 0 12px 24px -12px var(--au-c1);
    transition: background-position 0.3s ease, transform 0.12s ease, box-shadow 0.2s ease;
}

.au-btn:hover {
    background-position: 100% 0;
    box-shadow: 0 16px 30px -12px var(--au-c1);
    color: #fff;
}

.au-btn:active {
    transform: translateY(1px);
}

.au-btn--ghost {
    background: var(--au-field);
    border: 1px solid var(--au-field-border);
    color: var(--au-text);
    box-shadow: none;
}

.au-btn--ghost:hover {
    background: color-mix(in srgb, var(--au-c1) 8%, transparent);
    border-color: var(--au-c1);
    color: var(--au-text);
    box-shadow: none;
}

/* Divider */

.au-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.5rem 0;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--au-muted);
}

.au-divider::before,
.au-divider::after {
    content: "";
    flex: 1 1 auto;
    height: 1px;
    background-color: var(--au-border);
}

/* Row helpers */

.au-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    font-size: 0.8125rem;
}

.au-link {
    color: var(--au-c1);
    font-weight: 600;
    text-decoration: none;
}

.au-link:hover {
    text-decoration: underline;
    color: var(--au-c1);
}

.au-check {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--au-muted);
    user-select: none;
}

.au-check input {
    width: 1rem;
    height: 1rem;
    accent-color: var(--au-c1);
}

.au-foot {
    margin: 1.5rem 0 0;
    text-align: center;
    font-size: 0.8125rem;
    color: var(--au-muted);
}

.au-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.7rem 0.85rem;
    margin-bottom: 1.25rem;
    border-radius: 0.75rem;
    font-size: 0.8125rem;
    background-color: color-mix(in srgb, #10b981 14%, transparent);
    color: #059669;
}

[data-bs-theme="dark"] .au-alert {
    color: #34d399;
}

/* Top-right utilities */

.au__tools {
    position: absolute;
    top: 1.25rem;
    inset-inline-end: 1.25rem;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.au-tool {
    display: grid;
    place-items: center;
    min-width: 2.25rem;
    height: 2.25rem;
    padding-inline: 0.5rem;
    border: 1px solid var(--au-border);
    border-radius: 0.625rem;
    background-color: var(--au-surface);
    backdrop-filter: blur(12px);
    color: var(--au-muted);
    font-size: 0.8125rem;
    font-weight: 650;
    text-decoration: none;
}

.au-tool:hover,
.au-tool.is-active {
    color: var(--au-c1);
    border-color: var(--au-c1);
}

/* Mobile brand strip */

.au__mobile-brand {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

@media (min-width: 992px) {
    .au__mobile-brand {
        display: none;
    }
}