/* CSS Variables defining both states */
:root {
    /* Light Mode Palette */
    --bg-color: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-heading: #475569;
    --border-card: #e2e8f0;
    --border-dashed: #cbd5e1;
    --emerald-accent: #059669;
    --cyan-accent: #0891b2;
    --grid-color: rgba(0, 0, 0, 0.04);
    --card-active-bg: rgba(240, 253, 250, 0.4);
    --card-active-hover: rgba(240, 253, 250, 0.8);
    --card-incubating-bg: #f8fafc;
    --card-reserved-badge: #f1f5f9;
    --modal-bg: #ffffff;
    --input-bg: #ffffff;
    --terminal-bg: #f8fafc;
    --terminal-text: #0f172a;
}

[data-theme="dark"] {
    /* Dark Mode Palette */
    --bg-color: #030712;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-heading: #6b7280;
    --border-card: #1f2937;
    --border-dashed: #1f2937;
    --emerald-accent: #34d399;
    --cyan-accent: #06b6d4;
    --grid-color: rgba(255, 255, 255, 0.04);
    --card-active-bg: rgba(4, 47, 31, 0.1);
    --card-active-hover: rgba(4, 47, 31, 0.2);
    --card-incubating-bg: rgba(17, 24, 39, 0.2);
    --card-reserved-badge: #111827;
    --modal-bg: #0f172a;
    --input-bg: #1e293b;
    --terminal-bg: #0f172a;
    --terminal-text: #34d399;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    position: relative;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.font-mono {
    font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace !important;
}

/* Ambient grid pattern background overlay adapting instantly to variables */
.bg-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(to right, var(--grid-color) 1px, transparent 1px), linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    background-size: 4rem 4rem;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.bg-grid-overlay-full {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(to right, var(--grid-color) 1px, transparent 1px), linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    background-size: 4rem 4rem;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, #000 70%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, #000 70%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.content-wrapper {
    position: relative;
    z-index: 10;
}

/* Dynamic Text Gradient */
.text-gradient {
    background: linear-gradient(to right, var(--emerald-accent), var(--cyan-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Nav & Toggle Button Styling */
.nav-action-btn {
    background: transparent;
    border: 1px solid var(--border-card);
    color: var(--text-muted);
    padding: 0.5rem 0.85rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

    .nav-action-btn:hover {
        border-color: var(--emerald-accent);
        color: var(--emerald-accent);
        background-color: var(--card-active-bg);
    }

.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-card);
    color: var(--text-muted);
    padding: 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s ease, color 0.2s ease;
}

    .theme-toggle-btn:hover {
        border-color: var(--emerald-accent);
        color: var(--emerald-accent);
    }

/* Hide conflicting icon states natively based on the data-theme attribute */
[data-theme="dark"] .sun-icon,
html:not([data-theme="dark"]) .moon-icon {
    display: none;
}

/* Theme-aware Modal customization */
.custom-modal-content {
    background-color: var(--modal-bg);
    border: 1px solid var(--border-card);
    color: var(--text-main);
}

.custom-modal-header {
    border-bottom: 1px solid var(--border-card);
}

.custom-modal-footer {
    border-top: 1px solid var(--border-card);
}

.custom-form-control {
    background-color: var(--input-bg);
    border: 1px solid var(--border-card);
    color: var(--text-main);
}

    .custom-form-control:focus {
        background-color: var(--input-bg);
        border-color: var(--emerald-accent);
        color: var(--text-main);
        box-shadow: 0 0 0 0.25rem rgba(5, 150, 105, 0.15);
    }

[data-theme="dark"] .btn-close {
    filter: invert(1) grayscale(1) brightness(2);
}

/* Cards Layout */
.system-card {
    height: 16rem;
    padding: 1.5rem;
    border-radius: 0.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    backdrop-filter: blur(4px);
}

.card-active {
    border: 1px solid var(--border-card);
    background-color: var(--card-active-bg);
}

    .card-active:hover {
        border-color: var(--emerald-accent);
        background-color: var(--card-active-hover);
    }

[data-theme="dark"] .card-active:hover h3 {
    color: #a7f3d0 !important;
}

html:not([data-theme="dark"]) .card-active:hover h3 {
    color: #047857 !important;
}

.card-incubating {
    border: 1px solid var(--border-card);
    background-color: var(--card-incubating-bg);
}

.card-reserved {
    border: 1px dashed var(--border-dashed);
    background-color: transparent;
}

.tracking-widest {
    letter-spacing: 0.1em;
}

.tracking-wider {
    letter-spacing: 0.05em;
}

.tracking-tight {
    letter-spacing: -0.025em;
}
.tracking-tighter {
    letter-spacing: -0.05em;
}

.pulse-dot {
    width: 0.625rem;
    height: 0.625rem;
    background-color: var(--emerald-accent);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }

    50% {
        opacity: .5;
    }
}

/* 404 pages */
/* Diagnostic Console Box */
.diagnostic-box {
    background-color: var(--terminal-bg);
    border: 1px solid var(--border-card);
    border-radius: 0.75rem;
    padding: 1.5rem;
    max-width: 500px;
    margin: 2rem auto;
    text-align: left;
    position: relative;
    box-shadow: 0 10px 30px -15px rgba(0,0,0,0.1);
}

/* Glow effect on dark mode */
[data-theme="dark"] .diagnostic-box {
    box-shadow: 0 10px 40px -20px rgba(52, 211, 153, 0.15);
}


/* Buttons */
.action-btn {
    background: transparent;
    border: 1px solid var(--border-card);
    color: var(--text-muted);
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

    .action-btn:hover {
        border-color: var(--emerald-accent);
        color: var(--emerald-accent);
        background-color: rgba(5, 150, 105, 0.05);
    }

.error-code {
    font-size: calc(5rem + 4vw);
    font-weight: 900;
    line-height: 1;
}

/* Blinking terminal cursor animation */
.cursor {
    display: inline-block;
    width: 8px;
    height: 15px;
    background-color: var(--emerald-accent);
    animation: blink 1s step-end infinite;
    margin-left: 4px;
    vertical-align: middle;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}