/* ===== CSS Variables ===== */
:root {
    /* Colors - Background */
    --color-bg-primary: #0d0d1a;
    --color-bg-secondary: rgba(22, 33, 62, 0.95);
    --color-bg-tertiary: rgba(22, 33, 62, 0.98);
    --color-bg-transparent: rgba(22, 33, 62, 0.9);
    --color-bg-input: #1a1a2e;
    --color-bg-hover: #2a3a5e;
    --color-bg-button: #1a2540;
    --color-bg-button-hover: #243050;
    --color-bg-avatar: #2a2a4e;

    /* Colors - Text */
    --color-text-primary: #eee;
    --color-text-secondary: #ccc;
    --color-text-tertiary: #aaa;
    --color-text-muted: #888;
    --color-text-dark: #667;
    --color-text-light: #ddd;
    --color-text-white: #fff;
    --color-text-black: #000;

    /* Colors - Accent */
    --color-accent-primary: #0f9;
    --color-accent-primary-hover: #0da;
    --color-accent-secondary: #89f;
    --color-accent-secondary-hover: #abf;
    --color-accent-tertiary: #acd;
    --color-accent-quaternary: #cef;
    --color-accent-selection: rgb(255, 100, 180);
    --color-accent-cyan: #0ff;

    /* Colors - Borders */
    --color-border-primary: #334;
    --color-border-secondary: #557;
    --color-border-tertiary: #779;
    --color-border-checkbox: #556;

    /* Colors - Status */
    --color-success: #0f9;
    --color-success-hover: #0da;
    --color-danger: #f44;
    --color-danger-hover: #d33;
    --color-danger-border: #f66;
    --color-disabled: #556;
    --color-disabled-text: #889;

    /* Colors - Preview backgrounds */
    --color-preview-path-bg: rgba(0, 255, 153, 0.05);
    --color-preview-path-border: rgba(0, 255, 153, 0.2);
    --color-preview-midpoint-bg: rgba(0, 191, 255, 0.05);
    --color-preview-midpoint-border: rgba(0, 191, 255, 0.2);
    --color-preview-surrounding-bg: rgba(138, 43, 226, 0.05);
    --color-preview-surrounding-border: rgba(138, 43, 226, 0.2);
    --color-selection-bg: rgba(255, 100, 180, 0.1);
    --color-selection-bg-light: rgba(255, 100, 180, 0.3);

    /* Spacing */
    --spacing-xs: 3px;
    --spacing-sm: 4px;
    --spacing-md: 6px;
    --spacing-lg: 8px;
    --spacing-xl: 10px;
    --spacing-2xl: 12px;
    --spacing-3xl: 14px;
    --spacing-4xl: 16px;
    --spacing-5xl: 20px;

    /* Font sizes */
    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-md: 13px;
    --font-size-lg: 14px;
    --font-size-xl: 15px;
    --font-size-2xl: 16px;
    --font-size-3xl: 18px;
    --font-size-4xl: 24px;

    /* Border radius */
    --radius-sm: 3px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-circle: 50%;

    /* Transitions */
    --transition-fast: 0.15s;
    --transition-normal: 0.2s;
    --transition-slow: 0.25s;
    --transition-ease: ease;
    --transition-ease-in-out: ease-in-out;

    /* Shadows */
    --shadow-glow: 0 0 8px rgba(0, 255, 255, 0.3);
    --shadow-glow-white: 0 0 8px rgba(255, 255, 255, 0.5);
    --shadow-dark-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-dark-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-dark-sm: 0 2px 4px rgba(0, 0, 0, 0.3);

    /* Layout */
    --width-search-box: 300px;
    --width-sidebar: 300px;
    --height-button-sm: 36px;
}

/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    overflow: hidden;
}

#deck-canvas {
    width: 100vw;
    height: 100vh;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-primary);
    border-radius: var(--radius-sm);
}

/* ===== Utility Classes ===== */

/* Flexbox utilities */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-align-center {
    display: flex;
    align-items: center;
}

.flex-gap-xs {
    gap: var(--spacing-sm);
}

.flex-gap-sm {
    gap: var(--spacing-md);
}

.flex-gap-md {
    gap: var(--spacing-lg);
}

.flex-wrap {
    flex-wrap: wrap;
}

.flex-1 {
    flex: 1;
}

/* Spacing utilities */
.mt-xs {
    margin-top: var(--spacing-sm);
}

.mt-sm {
    margin-top: var(--spacing-md);
}

.mt-md {
    margin-top: var(--spacing-lg);
}

.mt-lg {
    margin-top: var(--spacing-2xl);
}

.mb-xs {
    margin-bottom: var(--spacing-sm);
}

.mb-sm {
    margin-bottom: var(--spacing-md);
}

.mb-md {
    margin-bottom: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-2xl);
}

.ml-checkbox {
    margin-left: 22px;
}

.pt-md {
    padding-top: var(--spacing-lg);
}

.pt-lg {
    padding-top: var(--spacing-2xl);
}

/* Text utilities */
.text-xs {
    font-size: var(--font-size-xs);
}

.text-sm {
    font-size: var(--font-size-sm);
}

.text-md {
    font-size: var(--font-size-md);
}

.text-lg {
    font-size: var(--font-size-lg);
}

.text-muted {
    color: var(--color-text-muted);
}

.text-secondary {
    color: var(--color-text-secondary);
}

.text-accent {
    color: var(--color-accent-primary);
}

.font-weight-600 {
    font-weight: 600;
}

/* Border utilities */
.border-top {
    border-top: 1px solid var(--color-border-primary);
}

/* Collapsible section */
.collapsible-section {
    display: none;
}

/* Form row */
.form-row {
    display: flex;
    gap: var(--spacing-md);
}

/* Width utilities */
.w-100 {
    width: 100%;
}

.w-100px {
    width: 100px;
}

.w-120px {
    width: 120px;
}

/* Opacity utilities */
.opacity-50 {
    opacity: 0.5;
}

/* Label styles */
.label-flex {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
}

.label-flex-sm {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Checkbox accent */
.checkbox-accent {
    accent-color: var(--color-accent-primary);
}

/* Select styles */
.select-input {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    background: var(--color-bg-input);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

/* Info text */
.info-text {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.info-text-xs {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-md);
}