:root {
    color-scheme: dark;
    --bg: #07111f;
    --surface: rgba(15, 29, 48, 0.82);
    --surface-strong: #101f33;
    --border: rgba(148, 163, 184, 0.16);
    --text: #f8fafc;
    --muted: #94a3b8;
    --primary: #38bdf8;
    --primary-strong: #0284c7;
    --success: #34d399;
    --danger: #fb7185;
    --shadow: 0 32px 80px rgba(0, 0, 0, 0.38);
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    background:
        radial-gradient(circle at 14% 20%, rgba(14, 165, 233, 0.16), transparent 32rem),
        radial-gradient(circle at 86% 82%, rgba(45, 212, 191, 0.1), transparent 28rem),
        var(--bg);
    color: var(--text);
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
    font: inherit;
}

.auth-shell {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
    min-height: 100vh;
    isolation: isolate;
}

.auth-shell::before {
    position: fixed;
    z-index: -1;
    top: -9rem;
    right: -7rem;
    width: 26rem;
    height: 26rem;
    border: 1px solid rgba(56, 189, 248, 0.12);
    border-radius: 50%;
    content: "";
    box-shadow:
        0 0 0 4rem rgba(56, 189, 248, 0.025),
        0 0 0 8rem rgba(56, 189, 248, 0.018);
}

.brand-panel {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100vh;
    padding: clamp(2rem, 5vw, 5rem);
    border-right: 1px solid var(--border);
}

.brand {
    display: inline-flex;
    gap: 0.8rem;
    align-items: center;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand-mark {
    display: grid;
    width: 2.65rem;
    height: 2.65rem;
    place-items: center;
    border: 1px solid rgba(56, 189, 248, 0.28);
    border-radius: 0.85rem;
    background: linear-gradient(145deg, rgba(56, 189, 248, 0.2), rgba(2, 132, 199, 0.06));
    color: var(--primary);
    box-shadow: 0 10px 35px rgba(14, 165, 233, 0.12);
}

.brand-mark svg {
    width: 1.4rem;
    height: 1.4rem;
}

.brand-copy {
    max-width: 38rem;
    margin: auto 0;
    padding: 4rem 0;
}

.eyebrow {
    display: inline-flex;
    gap: 0.55rem;
    align-items: center;
    margin-bottom: 1.25rem;
    color: #7dd3fc;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.eyebrow::before {
    width: 1.5rem;
    height: 1px;
    background: var(--primary);
    content: "";
}

.brand-copy h1 {
    max-width: 12ch;
    margin: 0;
    font-size: clamp(2.65rem, 5vw, 5.2rem);
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.brand-copy h1 span {
    color: var(--primary);
}

.brand-copy > p {
    max-width: 34rem;
    margin: 1.5rem 0 0;
    color: #b5c2d3;
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    line-height: 1.75;
}

.feature-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
}

.feature-pill {
    display: inline-flex;
    gap: 0.5rem;
    align-items: center;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(15, 29, 48, 0.48);
    color: #cbd5e1;
    font-size: 0.82rem;
}

.feature-pill::before {
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 50%;
    background: var(--success);
    content: "";
    box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.08);
}

.brand-footer {
    color: #64748b;
    font-size: 0.78rem;
}

.form-panel {
    display: grid;
    min-height: 100vh;
    padding: clamp(1.5rem, 5vw, 4rem);
    place-items: center;
}

.auth-card {
    width: min(100%, 30rem);
    padding: clamp(1.6rem, 4vw, 2.5rem);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(24px);
}

.mobile-brand {
    display: none;
    margin-bottom: 2rem;
}

.auth-card h2 {
    margin: 0;
    font-size: clamp(1.7rem, 3vw, 2.1rem);
    letter-spacing: -0.04em;
}

.auth-subtitle {
    margin: 0.65rem 0 2rem;
    color: var(--muted);
    font-size: 0.93rem;
    line-height: 1.6;
}

.form-grid {
    display: grid;
    gap: 1.1rem;
}

.field {
    display: grid;
    gap: 0.5rem;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.9rem;
}

.field label {
    color: #dbe7f3;
    font-size: 0.82rem;
    font-weight: 600;
}

.input-wrap {
    position: relative;
}

.input-wrap input {
    width: 100%;
    height: 3.25rem;
    padding: 0 3rem 0 1rem;
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 0.8rem;
    outline: none;
    background: rgba(5, 14, 26, 0.7);
    color: var(--text);
    transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.input-wrap input::placeholder {
    color: #56667a;
}

.input-wrap input:hover {
    border-color: rgba(148, 163, 184, 0.34);
}

.input-wrap input:focus {
    border-color: var(--primary);
    background: rgba(5, 14, 26, 0.95);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
}

.input-action {
    position: absolute;
    top: 50%;
    right: 0.7rem;
    display: grid;
    width: 2rem;
    height: 2rem;
    padding: 0;
    transform: translateY(-50%);
    place-items: center;
    border: 0;
    border-radius: 0.5rem;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}

.input-action:hover {
    background: rgba(148, 163, 184, 0.08);
    color: var(--text);
}

.input-action svg {
    width: 1.15rem;
    height: 1.15rem;
}

.field-hint {
    margin: 0;
    color: #64748b;
    font-size: 0.72rem;
}

.submit-button {
    display: flex;
    gap: 0.6rem;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 3.25rem;
    margin-top: 0.35rem;
    padding: 0.8rem 1rem;
    border: 0;
    border-radius: 0.85rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    color: #03111d;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 14px 30px rgba(2, 132, 199, 0.18);
    transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

.submit-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 18px 36px rgba(2, 132, 199, 0.28);
}

.submit-button:disabled {
    cursor: wait;
    opacity: 0.68;
}

.spinner {
    display: none;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(3, 17, 29, 0.25);
    border-top-color: #03111d;
    border-radius: 50%;
    animation: spin 700ms linear infinite;
}

.submit-button.loading .spinner {
    display: block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.form-message {
    display: none;
    margin: 0;
    padding: 0.8rem 0.9rem;
    border: 1px solid rgba(251, 113, 133, 0.24);
    border-radius: 0.75rem;
    background: rgba(159, 18, 57, 0.12);
    color: #fecdd3;
    font-size: 0.82rem;
    line-height: 1.45;
}

.form-message.visible {
    display: block;
}

.form-message.success {
    border-color: rgba(52, 211, 153, 0.25);
    background: rgba(6, 95, 70, 0.14);
    color: #a7f3d0;
}

.auth-switch {
    margin: 1.5rem 0 0;
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
}

.auth-switch a {
    color: #7dd3fc;
    font-weight: 700;
    text-decoration: none;
}

.auth-switch a:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.demo-access {
    margin-top: 1.4rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.demo-access summary {
    color: #8190a3;
    font-size: 0.76rem;
    cursor: pointer;
    user-select: none;
}

.demo-access-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
    margin-top: 0.8rem;
}

.demo-value {
    padding: 0.65rem 0.75rem;
    border-radius: 0.65rem;
    background: rgba(5, 14, 26, 0.62);
    color: #b8c7d9;
    font-size: 0.75rem;
}

.demo-value span {
    display: block;
    margin-bottom: 0.18rem;
    color: #64748b;
    font-size: 0.65rem;
    text-transform: uppercase;
}

@media (max-width: 900px) {
    .auth-shell {
        grid-template-columns: 1fr;
    }

    .brand-panel {
        display: none;
    }

    .form-panel {
        min-height: 100vh;
    }

    .mobile-brand {
        display: inline-flex;
    }
}

@media (max-width: 520px) {
    .form-panel {
        align-items: start;
        padding: 1rem;
    }

    .auth-card {
        margin: 1rem 0;
        padding: 1.35rem;
        border-radius: 1.2rem;
    }

    .field-row {
        grid-template-columns: 1fr;
    }

    .demo-access-content {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}