:root {
    --bg-primary: #0a1220;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-layer: rgba(255, 255, 255, 0.04);
    --accent: #3b82f6;
    --accent-gold: #f59e0b;
    --text-main: #e2e8f0;
    --text-dim: #94a3b8;
    --border: rgba(255, 255, 255, 0.08);
    --glow-opacity: 0.5;
    --transition-speed: 0.8s;
}

/* ── Themes ── */
[data-theme="ocean"] {
    --bg-primary: #0f172a;
    --bg-card: rgba(46, 58, 140, 0.15);
    --bg-layer: rgba(65, 105, 225, 0.08);
    --accent: #ff6347;
    --text-main: #f0f8ff;
    --text-dim: #B7C7F7;
    --border: rgba(183, 199, 247, 0.12);
}

[data-theme="rose"] {
    --bg-primary: #1e1620;
    --bg-card: rgba(122, 63, 85, 0.2);
    --bg-layer: rgba(210, 88, 107, 0.08);
    --accent: #d2586b;
    --text-main: #f4c4af;
    --text-dim: #d2586b;
    --border: rgba(244, 196, 175, 0.12);
}

[data-theme="sunset"] {
    --bg-primary: #1a1a1a;
    --bg-card: rgba(169, 169, 169, 0.12);
    --bg-layer: rgba(255, 69, 0, 0.08);
    --accent: #ff4500;
    --text-main: #d3d3d3;
    --text-dim: #a9a9a9;
    --border: rgba(255, 69, 0, 0.15);
}

[data-theme="forest"] {
    --bg-primary: #0d1f18;
    --bg-card: rgba(95, 123, 90, 0.15);
    --bg-layer: rgba(10, 79, 59, 0.1);
    --accent: #5f7b5a;
    --text-main: #e0d8bb;
    --text-dim: #8faa88;
    --border: rgba(224, 216, 187, 0.12);
}

[data-theme="earth"] {
    --bg-primary: #2a2520;
    --bg-card: rgba(138, 121, 93, 0.15);
    --bg-layer: rgba(165, 42, 42, 0.08);
    --accent: #ab9c7f;
    --text-main: #e0d8bb;
    --text-dim: #8a795d;
    --border: rgba(171, 156, 127, 0.15);
}

[data-theme="pastel"] {
    --bg-primary: #2d2a28;
    --bg-card: rgba(186, 225, 223, 0.12);
    --bg-layer: rgba(160, 206, 217, 0.08);
    --accent: #A0CED9;
    --text-main: #F5E7DB;
    --text-dim: #BAE1DF;
    --border: rgba(249, 163, 163, 0.15);
}

[data-theme="custom"] {
    /* uses :root values or JS-overridden --accent */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

#bg-gradient {
    background:
        radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(245, 158, 11, 0.02) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, color-mix(in srgb, var(--bg-primary) 90%, var(--accent)) 100%);
    opacity: 1;
    transition: opacity var(--transition-speed);
    animation: gradientShift 20s ease-in-out infinite alternate;
}

@keyframes gradientShift {
    0% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(15deg); }
    100% { filter: hue-rotate(0deg); }
}

#bg-starfield,
#bg-particles,
#bg-aurora,
#bg-matrix,
#bg-orbs {
    opacity: 0;
    transition: opacity var(--transition-speed);
}

body[data-bg="gradient"] #bg-gradient { opacity: 1; }
body[data-bg="starfield"] #bg-starfield { opacity: 1; }
body[data-bg="particles"] #bg-particles { opacity: 1; }
body[data-bg="aurora"] #bg-aurora { opacity: 1; }
body[data-bg="matrix"] #bg-matrix { opacity: 1; }
body[data-bg="orbs"] #bg-orbs { opacity: 1; }

body[data-bg="gradient"] #bg-gradient { opacity: 1; }
body[data-bg="starfield"] #bg-gradient { opacity: 0; }
body[data-bg="particles"] #bg-gradient { opacity: 0; }
body[data-bg="aurora"] #bg-gradient { opacity: 0; }
body[data-bg="matrix"] #bg-gradient { opacity: 0; }
body[data-bg="orbs"] #bg-gradient { opacity: 0; }

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg-primary) 70%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-decoration: none;
    background: linear-gradient(135deg, var(--text-main), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-speed);
}

.nav-link:hover {
    color: var(--text-main);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.page-header {
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    animation: cardEnter 0.8s ease forwards;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-dim);
    font-size: 1.125rem;
}

/* Service Grid */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.service-card {
    position: relative;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed), background-color var(--transition-speed);
    opacity: 0;
    transform: translateY(30px);
    animation: cardEnter var(--transition-speed) ease forwards;
    overflow: hidden;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.25s; }
.service-card:nth-child(3) { animation-delay: 0.4s; }

.service-card:hover {
    transform: translateY(-6px);
    border-color: color-mix(in srgb, var(--accent) calc(var(--glow-opacity) * 80%), transparent);
    box-shadow:
        0 0 calc(40px * var(--glow-opacity)) color-mix(in srgb, var(--accent) calc(25% * var(--glow-opacity)), transparent),
        inset 0 0 0 1px color-mix(in srgb, var(--accent) calc(8% * var(--glow-opacity)), transparent);
}

@keyframes cardEnter {
    to { opacity: 1; transform: translateY(0); }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.card-desc {
    color: var(--text-dim);
    font-size: 0.9375rem;
    line-height: 1.5;
    flex: 1;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.card-link {
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: color var(--transition-speed);
}

/* Status */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    background: var(--bg-layer);
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    position: relative;
    background: var(--text-dim);
    transition: background 0.3s;
}

.status-dot.up {
    background: #22c55e;
    box-shadow: 0 0 8px #22c55e;
}

.status-dot.down {
    background: #ef4444;
    box-shadow: 0 0 8px #ef4444;
}

.status-dot.up::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 1px solid #22c55e;
    animation: pulse 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(2); opacity: 0; }
}

/* Settings FAB */
.settings-fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px color-mix(in srgb, var(--accent) 30%, transparent);
    transition: transform var(--transition-speed), background-color var(--transition-speed);
    z-index: 50;
}

.settings-fab:hover {
    transform: scale(1.1) rotate(30deg);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal {
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 2rem;
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition-speed), background-color var(--transition-speed), border-color var(--transition-speed);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-speed);
}

.modal-close:hover {
    color: var(--text-main);
}

.settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    transition: border-color var(--transition-speed);
}

.settings-row:last-child {
    border-bottom: none;
}

.settings-label {
    font-weight: 500;
    font-size: 0.9375rem;
}

.settings-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    background: none;
    padding: 0;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 2px solid var(--border);
    border-radius: 50%;
}

input[type="range"] {
    width: 120px;
    accent-color: var(--accent);
}

select,
select option {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.875rem;
    cursor: pointer;
    outline: none;
}

select:focus {
    border-color: var(--accent);
}

select option:hover,
select option:checked {
    background: var(--accent);
    color: #fff;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 2.5rem;
    animation: cardEnter 0.6s ease forwards;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.login-card h1 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-card .subtitle {
    margin-bottom: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dim);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-layer);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-main);
    font-size: 0.9375rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed), background-color var(--transition-speed);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 10%, transparent);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed);
    outline: none;
}

.btn-primary {
    background: var(--accent);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 4px 20px color-mix(in srgb, var(--accent) 30%, transparent);
}

.btn-secondary {
    background: var(--bg-layer);
    color: var(--text-main);
    border: 1px solid var(--border);
}

.text-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.text-link:hover {
    text-decoration: underline;
}

/* Account */
.account-grid {
    display: grid;
    gap: 1.5rem;
    max-width: 640px;
}

.account-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.account-card h2 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* Token Box */
.token-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 1.125rem;
    word-break: break-all;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    user-select: all;
}

/* Flash */
.flash-container {
    position: fixed;
    top: 5rem;
    right: 1.5rem;
    z-index: 150;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.flash-container .flash {
    pointer-events: auto;
}

.flash {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
    animation: slideIn 0.4s ease;
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: var(--bg-layer);
    color: var(--text-main);
}

.flash.success {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

.flash.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Glass utility */
.glass {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Responsive */
@media (max-width: 640px) {
    .navbar {
        padding: 1rem;
    }
    .nav-menu {
        gap: 1rem;
    }
    .nav-brand {
        font-size: 1rem;
    }
    .page-header h1 {
        font-size: 1.75rem;
    }
    .container {
        padding: 2rem 1rem;
    }
    .service-grid {
        grid-template-columns: 1fr;
    }
    .settings-fab {
        bottom: 1rem;
        right: 1rem;
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    .login-card {
        padding: 1.75rem;
    }
}