*,*::before,*::after { box-sizing: border-box; }

:root {
    color-scheme: dark;
    --rb-bg: #0a0908;
    --rb-surface: #121110;
    --rb-elevated: #1a1917;
    --rb-input-bg: #0d0c0b;
    --rb-border: #2a2825;
    --rb-border-strong: #6a655f;
    --rb-text: #f5f4f2;
    --rb-text-secondary: #9c9790;
    --rb-text-tertiary: #8a8680;
    --rb-primary: rgb(255 87 34);
    --rb-primary-soft: #ffd4b0;
    --rb-primary-text: #ff824a;
    --rb-btn-bg: var(--rb-primary);
    --rb-btn-fg: #0a0908;
    --rb-btn-hover: #ff6a3a;
    --rb-focus: #ff824a;
    --rb-danger: #ef4444;
    --rb-danger-text: #fca5a5;
    --rb-danger-bg: color-mix(in oklab, var(--rb-danger) 14%, var(--rb-surface));
    --rb-warning: #f59e0b;
    --rb-warning-text: #fcd34d;
    --rb-warning-bg: color-mix(in oklab, var(--rb-warning) 14%, var(--rb-surface));
    --rb-success: #22c55e;
    --rb-success-text: #86efac;
    --rb-success-bg: color-mix(in oklab, var(--rb-success) 14%, var(--rb-surface));
    --rb-info: #3b82f6;
    --rb-info-text: #93c5fd;
    --rb-info-bg: color-mix(in oklab, var(--rb-info) 14%, var(--rb-surface));
    --rb-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --rb-radius-xs: 3px;
    --rb-radius-sm: 4px;
    --rb-radius-md: 6px;
    --rb-radius-lg: 8px;
    --rb-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --rb-font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
    --rb-font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

html[data-theme="light"] {
    color-scheme: light;
    --rb-bg: #f3f1ed;
    --rb-surface: #ffffff;
    --rb-elevated: #f8f6f3;
    --rb-input-bg: #ffffff;
    --rb-border: #dcd8d2;
    --rb-border-strong: #8a857d;
    --rb-text: #1a1917;
    --rb-text-secondary: #4a4642;
    --rb-text-tertiary: #6b6762;
    --rb-primary-text: #b83a13;
    --rb-btn-bg: #c2410c;
    --rb-btn-fg: #ffffff;
    --rb-btn-hover: #a8330e;
    --rb-focus: #c2410c;
    --rb-danger: #dc2626;
    --rb-danger-text: #991b1b;
    --rb-danger-bg: #fdecec;
    --rb-warning: #d97706;
    --rb-warning-text: #92400e;
    --rb-warning-bg: #fdf1dc;
    --rb-success: #16a34a;
    --rb-success-text: #166534;
    --rb-success-bg: #e6f4ea;
    --rb-info: #2563eb;
    --rb-info-text: #1e40af;
    --rb-info-bg: #e8effa;
    --rb-shadow-sm: 0 1px 2px rgba(26, 25, 23, 0.05), 0 1px 3px rgba(26, 25, 23, 0.08);
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: var(--rb-bg);
    color: var(--rb-text);
    font-family: var(--rb-font-sans);
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0;
    -webkit-font-smoothing: antialiased;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    position: relative;
    overflow-x: hidden;
}

:focus-visible {
    outline: 2px solid var(--rb-focus);
    outline-offset: 2px;
}

.rb-wrap {
    width: 100%;
    max-width: 400px;
    position: relative;
}

.rb-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding: 0 0.25rem;
}

.rb-brand__logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--rb-text);
    border-radius: var(--rb-radius-sm);
}

.rb-logo__ember { fill: var(--rb-primary); }
.rb-logo__core { fill: var(--rb-primary-soft); }

.rb-brand__wordmark {
    font-family: var(--rb-font-display);
    font-weight: 700;
    font-size: 17px;
    color: var(--rb-text);
    letter-spacing: -0.02em;
}

.rb-brand__meta {
    font-family: var(--rb-font-sans);
    font-size: 11px;
    font-weight: 600;
    color: var(--rb-text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.rb-panel {
    background: var(--rb-surface);
    border: 1px solid var(--rb-border);
    border-radius: var(--rb-radius-lg);
    box-shadow: var(--rb-shadow-sm);
    padding: 1.75rem;
    position: relative;
}

.rb-panel__head {
    margin-bottom: 1.5rem;
    padding-left: 12px;
    box-shadow: inset 3px 0 0 0 var(--rb-primary);
    text-align: left;
}

.rb-eyebrow {
    display: block;
    font-family: var(--rb-font-sans);
    font-size: 11px;
    font-weight: 600;
    color: var(--rb-text-secondary);
    letter-spacing: 0.08em;
    margin-bottom: 0.35rem;
    text-transform: uppercase;
}

.rb-h1 {
    font-family: var(--rb-font-display);
    font-weight: 700;
    font-size: 20px;
    line-height: 1.25;
    color: var(--rb-text);
    margin: 0 0 0.25rem;
    letter-spacing: -0.01em;
}

.rb-lead {
    font-size: 13px;
    color: var(--rb-text-tertiary);
    margin: 0;
    line-height: 1.5;
}

.rb-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.rb-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.rb-field__label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.rb-label {
    font-family: var(--rb-font-sans);
    font-size: 12px;
    font-weight: 600;
    color: var(--rb-text-secondary);
    letter-spacing: 0;
}

.rb-forgot {
    font-size: 12px;
    color: var(--rb-primary-text);
    text-decoration: none;
    font-weight: 500;
}

.rb-forgot:hover {
    text-decoration: underline;
}

.rb-input {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    background: var(--rb-input-bg);
    border: 1px solid var(--rb-border-strong);
    border-radius: var(--rb-radius-md);
    color: var(--rb-text);
    font-family: var(--rb-font-sans);
    font-size: 14px;
    transition: border-color 120ms ease, box-shadow 120ms ease;
}

.rb-input:hover {
    border-color: var(--rb-focus);
}

.rb-input:focus {
    outline: none;
    border-color: var(--rb-focus);
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--rb-focus) 25%, transparent);
}

.rb-input::placeholder {
    color: var(--rb-text-tertiary);
    opacity: 1;
}

.rb-remember {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    user-select: none;
    cursor: pointer;
    font-size: 13px;
    color: var(--rb-text-secondary);
}

.rb-checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border: 1px solid var(--rb-border-strong);
    border-radius: var(--rb-radius-xs);
    background: var(--rb-input-bg);
    cursor: pointer;
    position: relative;
    transition: background 120ms ease, border-color 120ms ease;
    flex-shrink: 0;
}

.rb-checkbox:checked {
    background: var(--rb-btn-bg);
    border-color: var(--rb-btn-bg);
}

.rb-checkbox:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid var(--rb-btn-fg);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.rb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 40px;
    padding: 0 1.2rem;
    border-radius: var(--rb-radius-md);
    font-family: var(--rb-font-sans);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background 120ms ease, border-color 120ms ease, transform 80ms ease;
    width: 100%;
}

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

.rb-btn--primary {
    background: var(--rb-btn-bg);
    border-color: var(--rb-btn-bg);
    color: var(--rb-btn-fg);
}

.rb-btn--primary:hover {
    background: var(--rb-btn-hover);
    border-color: var(--rb-btn-hover);
    color: var(--rb-btn-fg);
}

.rb-btn__arrow {
    font-weight: 400;
    transition: transform 120ms ease;
}

.rb-btn:hover .rb-btn__arrow {
    transform: translateX(3px);
}

.rb-alert {
    --rb-alert-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm-1 8h2v7h-2zm0-4h2v2h-2z'/%3E%3C/svg%3E");
    display: grid;
    grid-template-columns: 18px minmax(0, 1fr) auto;
    column-gap: 10px;
    row-gap: 2px;
    align-items: start;
    padding: 12px 14px;
    border: 1px solid var(--rb-alert-line, var(--rb-border));
    border-left: 3px solid var(--rb-alert-accent, var(--rb-border-strong));
    border-radius: var(--rb-alert-radius, 6px);
    background: var(--rb-alert-bg, var(--rb-elevated, var(--rb-surface)));
    color: var(--rb-text);
    font-family: var(--rb-font-sans, system-ui, sans-serif);
    font-size: 13px;
    line-height: 1.45;
    margin-bottom: 1rem;
    position: relative;
}
.rb-alert::before {
    content: "";
    grid-column: 1;
    grid-row: 1 / span 2;
    width: 18px;
    height: 18px;
    margin-top: 1px;
    background: var(--rb-alert-fg, var(--rb-text-secondary, var(--rb-text)));
    -webkit-mask: var(--rb-alert-icon) center / contain no-repeat;
    mask: var(--rb-alert-icon) center / contain no-repeat;
}
.rb-alert__bar {
    grid-column: 2;
    font-family: var(--rb-font-sans, system-ui, sans-serif);
    font-size: 11px;
    font-weight: 600;
    line-height: 1.45;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--rb-alert-fg, var(--rb-text-secondary, var(--rb-text)));
}
.rb-alert__msg,
.rb-alert__body,
.rb-alert > span:not(.rb-alert__bar):not(.rb-alert__close) {
    grid-column: 2;
    min-width: 0;
    color: var(--rb-text);
    overflow-wrap: anywhere;
}
.rb-alert__close {
    grid-column: 3;
    grid-row: 1 / span 2;
    width: 32px;
    height: 32px;
    margin: -7px -8px -7px 0;
    padding: 0;
    border: 0;
    border-radius: var(--rb-alert-radius, 6px);
    background: transparent;
    color: var(--rb-text-secondary, var(--rb-text));
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
}
.rb-alert__close:hover {
    background: color-mix(in oklab, var(--rb-text) 8%, transparent);
    color: var(--rb-text);
}
.rb-alert__close:focus-visible {
    outline: 2px solid var(--rb-focus, var(--rb-alert-accent));
    outline-offset: 2px;
}
.rb-alert--err,
.rb-alert--danger {
    --rb-alert-accent: var(--rb-danger);
    --rb-alert-fg: var(--rb-danger-text);
    --rb-alert-bg: var(--rb-danger-bg);
    --rb-alert-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm-1 5h2v7h-2zm0 9h2v2h-2z'/%3E%3C/svg%3E");
}
.rb-alert--warn,
.rb-alert--warning {
    --rb-alert-accent: var(--rb-warning);
    --rb-alert-fg: var(--rb-warning-text);
    --rb-alert-bg: var(--rb-warning-bg);
    --rb-alert-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2 1 21h22L12 2zm-1 7h2v6h-2zm0 8h2v2h-2z'/%3E%3C/svg%3E");
}
.rb-alert--ok,
.rb-alert--success {
    --rb-alert-accent: var(--rb-success);
    --rb-alert-fg: var(--rb-success-text);
    --rb-alert-bg: var(--rb-success-bg);
    --rb-alert-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm-1.5 14.5-4-4 1.4-1.4 2.6 2.6 5.6-5.6 1.4 1.4z'/%3E%3C/svg%3E");
}
.rb-alert--info {
    --rb-alert-accent: var(--rb-info);
    --rb-alert-fg: var(--rb-info-text);
    --rb-alert-bg: var(--rb-info-bg);
    --rb-alert-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm-1 8h2v7h-2zm0-4h2v2h-2z'/%3E%3C/svg%3E");
}
@media (max-width: 480px) {
    .rb-alert { padding: 10px 12px; font-size: 12.5px; }
}

.rb-security {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--rb-border);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.rb-security__row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 12px;
    color: var(--rb-text-tertiary);
    font-family: var(--rb-font-sans);
    letter-spacing: 0;
}

.rb-security__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--rb-primary);
    flex-shrink: 0;
}

.rb-foot {
    margin-top: 1.25rem;
    padding: 0 0.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-family: var(--rb-font-sans);
    font-size: 12px;
    color: var(--rb-text-tertiary);
}

.rb-foot a {
    color: var(--rb-text-tertiary);
    text-decoration: none;
    transition: color 120ms ease;
}

.rb-foot a:hover {
    color: var(--rb-primary-text);
}

@media (max-width: 480px) {
    body { padding: 1.25rem 0.75rem; }
    .rb-panel { padding: 1.25rem; }
    .rb-foot { justify-content: center; text-align: center; }
}