/* ================================================================
   DESKTOP IDENTITY -- Two-panel layout, GenZ dark theme
   Only loaded on desktop views.
   ================================================================ */

/* --- AMBIENT ORBS --- */
.dk-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.12;
    pointer-events: none;
    z-index: 0;
    will-change: transform;
}

.dk-orb--red {
    background: linear-gradient(135deg, var(--dk-red), var(--dk-purple));
    width: 340px;
    height: 340px;
    top: -60px;
    left: -80px;
    animation: dk-drift-1 25s ease-in-out infinite alternate;
}

.dk-orb--blue {
    background: linear-gradient(135deg, var(--dk-blue), var(--dk-purple));
    width: 280px;
    height: 280px;
    bottom: -40px;
    right: -60px;
    animation: dk-drift-2 30s ease-in-out infinite alternate;
}

.dk-orb--purple {
    background: linear-gradient(135deg, var(--dk-purple), var(--dk-red-soft));
    width: 260px;
    height: 260px;
    top: 40%;
    left: 35%;
    animation: dk-drift-3 35s ease-in-out infinite alternate;
}

@keyframes dk-drift-1 {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(70px, 60px) scale(1.12); }
}

@keyframes dk-drift-2 {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-60px, -50px) scale(0.92); }
}

@keyframes dk-drift-3 {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, -70px) scale(1.06); }
}

@media (prefers-reduced-motion: reduce) {
    .dk-orb,
    .dk-text-shimmer {
        animation: none !important;
    }
}

/* --- TEXT SHIMMER --- */
.dk-text-shimmer {
    background: var(--dk-grad-text);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: dk-shimmer 4s linear infinite;
}

@keyframes dk-shimmer {
    0%   { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* --- FADE-IN-UP --- */
.dk-fade-in-up {
    opacity: 0;
    transform: translateY(18px);
    animation: dk-appear 0.5s var(--dk-ease) forwards;
}

.dk-fade-in-up:nth-child(2) { animation-delay: 0.08s; }
.dk-fade-in-up:nth-child(3) { animation-delay: 0.16s; }
.dk-fade-in-up:nth-child(4) { animation-delay: 0.24s; }
.dk-fade-in-up:nth-child(5) { animation-delay: 0.32s; }

@keyframes dk-appear {
    to { opacity: 1; transform: translateY(0); }
}

/* ================================================================
   DESKTOP SHELL -- full viewport dark backdrop
   ================================================================ */
.dk-desktop-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--dk-bg-deep);
    color: var(--dk-text);
    position: relative;
    overflow: hidden;
}

/* --- HEADER --- */
.dk-desktop-header {
    flex: 0 0 auto;
    background: var(--dk-bg);
    border-bottom: 1px solid var(--dk-border);
    padding: 0.6rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 10;
}

.dk-desktop-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--dk-grad-full);
    opacity: 0.6;
}

.dk-desktop-header__title {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.dk-desktop-header__title svg {
    width: 18px;
    height: 18px;
    opacity: 0.85;
    color: var(--dk-purple-soft);
}

/* --- FOOTER --- */
.dk-desktop-footer {
    flex: 0 0 auto;
    background: var(--dk-bg);
    border-top: 1px solid var(--dk-border);
    padding: 0.55rem 2rem;
    text-align: center;
    position: relative;
    z-index: 10;
}

.dk-desktop-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--dk-grad-full);
    opacity: 0.35;
}

.dk-desktop-footer__text {
    font-size: 0.82rem;
    color: var(--dk-text-dim);
    letter-spacing: 0.2px;
}

/* ================================================================
   TWO-PANEL BODY
   ================================================================ */
.dk-desktop-body {
    flex: 1;
    display: flex;
    min-height: 0;
    position: relative;
    z-index: 1;
}

/* --- LEFT PANEL: authenticator guide --- */
.dk-left-panel {
    flex: 0 0 46%;
    max-width: 46%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 3rem 3rem 4rem;
    overflow-y: auto;
    position: relative;
}

.dk-left-panel::after {
    content: "";
    position: absolute;
    top: 10%;
    right: 0;
    bottom: 10%;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--dk-border-hover), transparent);
}

.dk-guide-heading {
    font-size: 1.65rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.dk-guide-heading svg {
    width: 28px;
    height: 28px;
    color: var(--dk-purple-soft);
}

.dk-guide-subtitle {
    font-size: 0.95rem;
    color: var(--dk-text-muted);
    line-height: 1.55;
    margin-bottom: 2rem;
    max-width: 42ch;
}

/* step cards */
.dk-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 1.4rem;
    padding: 1rem 1.1rem;
    background: var(--dk-bg-card);
    border: 1px solid var(--dk-border);
    border-radius: var(--dk-radius);
    transition: border-color var(--dk-duration) var(--dk-ease),
                box-shadow var(--dk-duration) var(--dk-ease);
}

.dk-step:hover {
    border-color: var(--dk-border-hover);
    box-shadow: var(--dk-shadow-hover);
}

.dk-step__number {
    flex: 0 0 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--dk-grad-energy);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dk-step__content {
    flex: 1;
    min-width: 0;
}

.dk-step__title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.dk-step__desc {
    font-size: 0.85rem;
    color: var(--dk-text-muted);
    line-height: 1.45;
}

/* download buttons */
.dk-download-row {
    display: flex;
    gap: 10px;
    margin-top: 0.6rem;
    flex-wrap: wrap;
}

.dk-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.55rem 1rem;
    background: var(--dk-bg-card);
    border: 1px solid var(--dk-border);
    border-radius: var(--dk-radius-sm);
    color: var(--dk-text);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    transition: all var(--dk-duration) var(--dk-ease);
}

.dk-download-btn svg {
    width: 18px;
    height: 18px;
    color: var(--dk-purple-soft);
}

.dk-download-btn:hover {
    border-color: var(--dk-border-hover);
    background: var(--dk-bg-card-hover);
    box-shadow: var(--dk-shadow-hover);
    color: var(--dk-text);
    text-decoration: none;
    transform: translateY(-2px);
}

.dk-guide-tip {
    margin-top: 1.5rem;
    padding: 0.85rem 1rem;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.18);
    border-radius: var(--dk-radius);
    font-size: 0.85rem;
    color: var(--dk-text-muted);
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.dk-guide-tip svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--dk-purple-soft);
    margin-top: 1px;
}

/* --- RIGHT PANEL: identity form --- */
.dk-right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem 4rem 3rem 3rem;
    position: relative;
    overflow-y: auto;
}

.dk-form-section {
    width: 100%;
    max-width: 440px;
}

/* --- FORM CARD (glass-morphism, integrated) --- */
.dk-form-card {
    background: var(--dk-bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--dk-border);
    border-radius: var(--dk-radius-lg);
    padding: 2rem 2rem 1.75rem;
    box-shadow: var(--dk-shadow-card);
    position: relative;
    overflow: hidden;
    text-align: center;
}

/* Recovery: extra actions (QR upload) must not be clipped by overflow:hidden */
.dk-form-card.dk-form-card--recovery {
    overflow: visible;
}

.dk-form-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--dk-grad-full);
    opacity: 0.7;
}

/* eyebrow badge */
.dk-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.7rem;
    color: var(--dk-text-muted);
    padding: 0.35rem 0.8rem;
    border-radius: var(--dk-radius-full);
    border: 1px solid var(--dk-border);
    background: var(--dk-bg-card);
    margin-bottom: 0.85rem;
}

.dk-eyebrow svg {
    width: 13px;
    height: 13px;
    opacity: 0.7;
}

.dk-eyebrow--warning {
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--dk-warning);
}

/* form heading */
.dk-form-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0 0 0.35rem 0;
    letter-spacing: -0.01em;
}

.dk-form-subtitle {
    font-size: 0.92rem;
    color: var(--dk-text-muted);
    line-height: 1.5;
    margin-bottom: 1.4rem;
    max-width: 38ch;
    margin-left: auto;
    margin-right: auto;
}

/* security icon */
.dk-security-icon {
    width: 52px;
    height: 52px;
    background: var(--dk-grad-energy);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    box-shadow: 0 6px 24px rgba(255, 45, 85, 0.2);
}

.dk-security-icon svg {
    width: 26px;
    height: 26px;
    color: #fff;
}

.dk-security-icon--waiting {
    background: var(--dk-grad-cool);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.2);
}

.dk-security-icon--alert {
    background: linear-gradient(135deg, var(--dk-danger), var(--dk-red));
    box-shadow: 0 6px 24px rgba(239, 68, 68, 0.2);
}

.dk-security-icon--expired {
    background: linear-gradient(135deg, var(--dk-warning), #e67e22);
    box-shadow: 0 6px 24px rgba(245, 158, 11, 0.2);
}

/* inputs */
.dk-input {
    width: 100%;
    background: var(--dk-bg-input);
    border: 1.5px solid var(--dk-border);
    color: var(--dk-text);
    font-family: 'Segoe UI', Inter, Arial, sans-serif;
    font-size: 1rem;
    border-radius: var(--dk-radius-sm);
    padding: 0.75rem 1rem;
    text-align: left;
    transition: all 0.2s var(--dk-ease);
    box-sizing: border-box;
}

.dk-input::placeholder {
    color: var(--dk-text-dim);
    opacity: 1;
}

.dk-input:focus {
    outline: none;
    border-color: var(--dk-purple);
    box-shadow: 0 0 0 3px var(--dk-purple-glow);
    background: var(--dk-bg-card);
}

.dk-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 6-digit email OTP / recovery code input */
.dk-numeric-code-input {
    font-family: 'SF Mono', 'Courier New', monospace;
    font-weight: 700;
    font-size: 1.6rem;
    text-align: center;
    letter-spacing: 0.6rem;
    padding: 0.85rem 1rem;
    border-width: 2px;
}

.dk-numeric-code-input::placeholder {
    letter-spacing: 0.4rem;
    font-weight: 500;
}

/* primary button */
.dk-btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 0.85rem 0;
    background: var(--dk-grad-energy);
    color: #fff;
    border: none;
    border-radius: var(--dk-radius-sm);
    font-weight: 600;
    font-size: 1.02rem;
    cursor: pointer;
    transition: all 0.2s var(--dk-ease);
    box-shadow: 0 4px 16px rgba(255, 45, 85, 0.2);
    text-decoration: none;
}

.dk-btn-primary svg {
    width: 18px;
    height: 18px;
}

.dk-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(255, 45, 85, 0.3);
    color: #fff;
    text-decoration: none;
}

.dk-btn-primary:active {
    transform: scale(0.98);
}

.dk-btn-primary:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* secondary button */
.dk-btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 0.8rem 0;
    background: transparent;
    color: var(--dk-text);
    border: 1.5px solid var(--dk-border);
    border-radius: var(--dk-radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s var(--dk-ease);
    text-decoration: none;
}

.dk-btn-secondary svg {
    width: 16px;
    height: 16px;
}

.dk-btn-secondary:hover {
    border-color: var(--dk-border-hover);
    background: var(--dk-bg-card);
    color: var(--dk-text);
    text-decoration: none;
}

.dk-btn-secondary:disabled,
.dk-btn-secondary.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* create / outline button */
.dk-btn-outline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 0.8rem 0;
    background: transparent;
    color: var(--dk-text-muted);
    border: 1.5px dashed var(--dk-border);
    border-radius: var(--dk-radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s var(--dk-ease);
    text-decoration: none;
}

.dk-btn-outline:hover {
    border-style: solid;
    border-color: var(--dk-border-hover);
    color: var(--dk-text);
    text-decoration: none;
}

.dk-btn-outline svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* alerts */
.dk-alert {
    padding: 0.7rem 0.9rem;
    border-radius: var(--dk-radius-sm);
    font-size: 0.88rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.45;
}

.dk-alert__message {
    flex: 1;
    min-width: 0;
    line-height: 1.45;
}

.dk-alert svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.dk-alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.25);
    color: var(--dk-blue-soft);
}

.dk-alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.25);
    color: var(--dk-success);
}

.dk-alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.25);
    color: var(--dk-warning);
}

.dk-alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: var(--dk-danger);
}

/* divider */
.dk-divider {
    display: flex;
    align-items: center;
    margin: 1.2rem 0;
    gap: 0.75rem;
}

.dk-divider::before,
.dk-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--dk-border-hover), transparent);
}

.dk-divider span {
    font-size: 0.75rem;
    color: var(--dk-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 500;
}

/* recovery / back link */
.dk-link {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.88rem;
}

.dk-link a {
    color: var(--dk-text-muted);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.4rem 0.75rem;
    border-radius: 0.35rem;
    font-weight: 500;
    transition: all 0.2s;
}

.dk-link a svg {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

.dk-link a:hover,
.dk-link a:focus {
    color: var(--dk-text, #f0f0f8);
    text-decoration: none;
    background: var(--dk-bg-card-hover, #262636);
}

/* hint text */
.dk-hint {
    font-size: 0.82rem;
    color: var(--dk-text-dim);
    text-align: center;
    margin-top: 0.4rem;
}

/* attempts warning */
.dk-attempts-warning {
    font-size: 0.88rem;
    color: var(--dk-danger);
    text-align: center;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

/* footnote */
.dk-footnote {
    text-align: center;
    font-size: 0.8rem;
    color: var(--dk-text-dim);
    margin-top: 0.5rem;
}

/* agreement box */
.dk-agreement-box {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.8rem;
    background: var(--dk-bg-card);
    border: 1px solid var(--dk-border);
    border-radius: var(--dk-radius-sm);
    margin-bottom: 0.5rem;
}

.dk-agreement-box .form-check-input {
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.dk-agreement-label {
    font-size: 0.82rem;
    color: var(--dk-text-muted);
    line-height: 1.45;
}

.dk-agreement-label a {
    color: var(--dk-purple-soft);
    text-decoration: underline;
}

.dk-agreement-label a:hover {
    color: var(--dk-red-soft);
}

/* option cards (AccountExists, SessionExpired) */
.dk-options-container {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.dk-option-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--dk-bg-card);
    border: 1px solid var(--dk-border);
    border-radius: var(--dk-radius);
    text-decoration: none;
    color: inherit;
    transition: all 0.2s var(--dk-ease);
    cursor: pointer;
}

.dk-option-card:hover {
    border-color: var(--dk-border-hover);
    box-shadow: var(--dk-shadow-hover);
    transform: translateY(-2px);
    text-decoration: none;
    color: inherit;
}

.dk-option-card--secondary {
    border-style: dashed;
}

.dk-option-card--secondary:hover {
    border-style: solid;
}

.dk-option-icon {
    width: 42px;
    height: 42px;
    background: var(--dk-grad-cool);
    border-radius: var(--dk-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dk-option-icon svg {
    width: 20px;
    height: 20px;
    color: #fff;
}

.dk-option-content {
    flex: 1;
    min-width: 0;
}

.dk-option-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.15rem;
}

.dk-option-desc {
    font-size: 0.82rem;
    color: var(--dk-text-muted);
    line-height: 1.4;
}

.dk-option-arrow {
    width: 18px;
    height: 18px;
    color: var(--dk-text-dim);
    flex-shrink: 0;
    transition: all 0.2s;
}

.dk-option-card:hover .dk-option-arrow {
    color: var(--dk-purple-soft);
    transform: translateX(3px);
}

/* notice panel */
.dk-notice-panel {
    background: var(--dk-bg-card);
    border: 1px solid var(--dk-border);
    border-radius: var(--dk-radius);
    padding: 1rem;
}

.dk-notice-panel__title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.92rem;
    margin-bottom: 0.5rem;
}

.dk-notice-panel__title svg {
    width: 18px;
    height: 18px;
    color: var(--dk-blue-soft);
}

.dk-notice-panel__content {
    font-size: 0.88rem;
    color: var(--dk-text-muted);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.dk-notice-panel__list {
    margin: 0.5rem 0 0 0;
    padding-left: 1.25rem;
    font-size: 0.85rem;
    color: var(--dk-text-muted);
}

.dk-notice-panel__list li {
    margin-bottom: 0.25rem;
}

/* info text */
.dk-info-text {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--dk-text-dim);
    line-height: 1.45;
    text-align: left;
}

.dk-info-text svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    margin-top: 1px;
    opacity: 0.7;
}

/* --- Device Mismatch --- */
.dk-device-mismatch {
    text-align: center;
    padding: 0.25rem 0;
}

.dk-device-mismatch__title {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--dk-text);
    margin-bottom: 0.35rem;
}

.dk-device-mismatch__text {
    font-size: 0.88rem;
    color: var(--dk-text-muted);
    line-height: 1.5;
    margin-bottom: 1.1rem;
    max-width: 36ch;
    margin-left: auto;
    margin-right: auto;
}

.dk-device-mismatch__text strong {
    color: var(--dk-text);
    font-weight: 600;
}

/* --- RESPONSIVE --- */
@media (max-width: 1100px) {
    .dk-left-panel {
        flex: 0 0 42%;
        max-width: 42%;
        padding: 2rem 2rem 2rem 2.5rem;
    }

    .dk-right-panel {
        padding: 2rem 2.5rem 2rem 2rem;
    }
}

@media (max-width: 900px) {
    .dk-desktop-body {
        flex-direction: column;
    }

    .dk-left-panel {
        flex: 0 0 auto;
        max-width: 100%;
        padding: 1.5rem 2rem;
    }

    .dk-left-panel::after {
        display: none;
    }

    .dk-right-panel {
        padding: 1.5rem 2rem;
    }
}