:root {
    /* ── Palette (Default Dark) ────────────────────────────────────────────────── */
    --color-bg-deep:      #04091a;
    --color-bg-dark:      #070d24;
    --color-surface:      rgba(255, 255, 255, 0.04);
    --color-surface-hover:rgba(255, 255, 255, 0.07);
    --color-border:       rgba(255, 255, 255, 0.08);
    --color-border-top:   rgba(180, 210, 255, 0.18);

    --color-primary:      #0078d4;       /* Microsoft blue */
    --color-primary-dark: #005fa3;
    --color-primary-glow: rgba(0, 120, 212, 0.35);
    --color-text-on-primary: #ffffff;

    --color-accent:       #50e3c2;       /* teal accent */
    --color-accent-dim:   rgba(80, 227, 194, 0.15);

    --color-text:         #e8eaf6;
    --color-text-muted:   rgba(232, 234, 246, 0.55);
    --color-text-faint:   rgba(232, 234, 246, 0.3);

    --color-error:        #ff6b6b;
    --color-error-bg:     rgba(255, 107, 107, 0.12);
    --color-success:      #51cf66;

    /* ── Orb colours (animated blobs) ─────────────────────────────────────────── */
    --orb-1: rgba(0,   120, 212, 0.22);
    --orb-2: rgba(80,  227, 194, 0.14);
    --orb-3: rgba(138,  43, 226, 0.18);
    --color-bg-gradient: #0d1a3a;
    --color-logo-start: #0078d4;
    --color-logo-end: #50e3c2;
    --shadow-logo: rgba(0,120,212,0.35);

    --color-bg-modal:     rgba(28, 32, 43, 0.9);
    --color-bg-input:     rgba(255, 255, 255, 0.05);
    --color-bg-modal-footer: rgba(0, 0, 0, 0.1);
    --color-modal-border: rgba(255, 255, 255, 0.1);
    --shadow-modal:       0 24px 64px rgba(0,0,0,0.5);

    /* ── Typography ───────────────────────────────────────────────────────────── */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    /* ── Radii ─────────────────────────────────────────────────────────────────── */
    --radius-sm:  6px;
    --radius-md:  12px;
    --radius-lg:  20px;
    --radius-xl:  28px;

    /* ── Shadows ──────────────────────────────────────────────────────────────── */
    --shadow-card:    0 24px 64px rgba(0,0,0,0.5), 0 4px 16px rgba(0,0,0,0.3);
    --shadow-btn:     0 4px 20px rgba(0, 120, 212, 0.4);
    --shadow-btn-hover: 0 6px 28px rgba(0, 120, 212, 0.6);

    /* ── Transitions ─────────────────────────────────────────────────────────── */
    --transition-fast:   150ms ease;
    --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    /* ── Palette (Stitch Light) ────────────────────────────────────────────────── */
    --color-bg-deep:      #f9f9f9;
    --color-bg-dark:      #eeeeee;
    --color-surface:      #ffffff;
    --color-surface-hover:#f0f0f0;
    --color-border:       #e2e2e2;
    --color-border-top:   #d0c6ab;

    --color-primary:      #ffd700;       /* Logo Gold */
    --color-primary-dark: #ffae00;       /* Logo Orange */
    --color-primary-glow: rgba(255, 215, 0, 0.25);
    --color-text-on-primary: #000000;

    --color-accent:       #00696f;       /* Stitch tertiary */
    --color-accent-dim:   rgba(0, 106, 112, 0.1);

    --color-text:         #1b1b1b;
    --color-text-muted:   #4d4732;
    --color-text-faint:   #7e775f;

    --color-error:        #ba1a1a;
    --color-error-bg:     #ffdad6;
    --color-success:      #006a70;

    --orb-1: rgba(255, 215, 0, 0.2);
    --orb-2: rgba(0, 219, 232, 0.1);
    --orb-3: rgba(112, 93, 0, 0.1);
    --color-bg-gradient: #ffffff;
    --color-logo-start: #ffd700;
    --color-logo-end: #ffae00;
    --shadow-logo: rgba(112, 93, 0, 0.4);

    --color-bg-modal:     #ffffff;
    --color-bg-input:     #f5f5f5;
    --color-bg-modal-footer: #f9f9f9;
    --color-modal-border: #e2e2e2;
    --shadow-modal:       0 12px 48px rgba(0,0,0,0.12);

    --shadow-card:    0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-btn:     0 4px 14px rgba(255, 174, 0, 0.3);
    --shadow-btn-hover: 0 6px 20px rgba(255, 174, 0, 0.45);
}


/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    font-family: var(--font-sans);
    background-color: var(--color-bg-deep);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ── Animated background ────────────────────────────────────────────────────── */
.bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: radial-gradient(ellipse at 20% 20%, var(--color-bg-gradient) 0%, var(--color-bg-deep) 65%);
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0;
    animation: orbFloat linear infinite;
}
.orb-1 {
    width: 520px; height: 520px;
    background: var(--orb-1);
    top: -160px; left: -100px;
    animation-duration: 18s;
    animation-delay: 0s;
}
.orb-2 {
    width: 420px; height: 420px;
    background: var(--orb-2);
    bottom: -120px; right: -80px;
    animation-duration: 22s;
    animation-delay: -8s;
}
.orb-3 {
    width: 340px; height: 340px;
    background: var(--orb-3);
    top: 40%; left: 55%;
    animation-duration: 26s;
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%   { opacity: 0;    transform: translateY(0px)   scale(1); }
    10%  { opacity: 1; }
    50%  { opacity: 0.8;  transform: translateY(-40px) scale(1.06); }
    90%  { opacity: 1; }
    100% { opacity: 0;    transform: translateY(0px)   scale(1); }
}

/* Star/dots grid overlay */
.bg-canvas::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
    background-size: 36px 36px;
    pointer-events: none;
}

/* ── Glass card base ────────────────────────────────────────────────────────── */
.glass-card {
    background:      var(--color-surface);
    border:          1px solid var(--color-border);
    border-top-color: var(--color-border-top);
    border-radius:   var(--radius-xl);
    backdrop-filter: blur(28px) saturate(160%);
    -webkit-backdrop-filter: blur(28px) saturate(160%);
    box-shadow:      var(--shadow-card);
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-smooth);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary); /* fallback */
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-on-primary);
    border: none;
    box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    box-shadow: var(--shadow-btn-hover);
    transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-ghost:hover {
    background: var(--color-surface-hover);
    border-color: rgba(255,255,255,0.16);
}

.btn-full { width: 100%; }

.btn-loading { pointer-events: none; opacity: 0.7; }
.btn-loading .btn-text { display: none; }
.btn-loading .btn-spinner { display: inline-block; }
.btn-spinner { display: none; }

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.theme-toggle:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.theme-toggle svg { width: 18px; height: 18px; }

/* Icon visibility based on theme */
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ── Spinner ────────────────────────────────────────────────────────────────── */
.spinner {
    width: 18px; height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Alert banner ────────────────────────────────────────────────────────────── */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13.5px;
    line-height: 1.5;
}
.alert-error {
    background: var(--color-error-bg);
    border: 1px solid rgba(255,107,107,0.25);
    color: var(--color-error);
}
.alert-success {
    background: rgba(81,207,102,0.1);
    border: 1px solid rgba(81,207,102,0.25);
    color: var(--color-success);
}

/* ── Divider ─────────────────────────────────────────────────────────────────── */
.divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text-faint);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* ── Fade-in animation ───────────────────────────────────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}
.fade-up {
    opacity: 0;
    animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.fade-up-delay-1 { animation-delay: 0.1s; }
.fade-up-delay-2 { animation-delay: 0.2s; }
.fade-up-delay-3 { animation-delay: 0.35s; }

/* ── Scrollbar ───────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.25); }

/* ── Admin View Styles ────────────────────────────────────────────────────────── */
.admin-view-header {
    margin-bottom: 32px;
}
.admin-view-header h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.admin-view-header p {
    color: var(--color-text-muted);
    font-size: 15px;
}

.admin-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.admin-table th {
    text-align: left;
    padding: 16px 24px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-faint);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--color-border);
}
.admin-table td {
    padding: 16px 24px;
    font-size: 14px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}
.admin-table tr:last-child td {
    border-bottom: none;
}
.admin-table tr:hover td {
    background: var(--color-surface-hover);
}

/* Status Badges */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.tag-admin { background: rgba(0, 120, 212, 0.15); color: var(--color-primary); }
.tag-user  { background: rgba(255, 255, 255, 0.05); color: var(--color-text-muted); }
.tag-success { background: rgba(81, 207, 102, 0.15); color: var(--color-success); }
.tag-error   { background: rgba(255, 107, 107, 0.15); color: var(--color-error); }

.tag-read { background: rgba(80, 227, 194, 0.1); color: #50e3c2; }
.tag-send { background: rgba(0, 120, 212, 0.1); color: #0078d4; }
.tag-move { background: rgba(138, 43, 226, 0.1); color: #8a2be2; }

/* Permission Grid */
.permission-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}
.permission-row:last-child { border-bottom: none; }
.permission-row label { font-size: 14px; font-weight: 500; }

/* Modal body scroll */
.modal-scrollable {
    max-height: 60vh;
    overflow-y: auto;
    padding-right: 8px;
}

/* Admin Tabs */
.admin-tabs {
    display: flex;
    gap: 24px;
    margin-top: -6px;
    margin-bottom: 24px;
}
.admin-tab {
    color: var(--color-text-faint);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding-bottom: 6px;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}
.admin-tab:hover {
    color: var(--color-text);
}
.admin-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ── Modals ────────────────────────────────────────────────────────── */
.modal, .modal-card {
    background: var(--color-bg-modal);
    border: 1px solid var(--color-modal-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-modal);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalScale 0.2s ease-out;
}

@keyframes modalScale {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}