/**
 * NSKit Base CSS v1.0
 *
 * 기본 Reset + Base 스타일
 *
 * @version 1.0.0
 */

/* ============================================
   Reset & Base
   ============================================ */

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--nskit-font-family);
    font-size: var(--nskit-font-size-base);
    line-height: var(--nskit-line-height-normal);
    color: var(--nskit-text-primary);
    background-color: var(--nskit-page-bg);
    font-weight: var(--nskit-font-weight-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   CSS Variables (Float UI 기반 디자인 시스템)
   ============================================ */

:root {
    /* Colors (Float UI Indigo/Blue palette) */
    --nskit-primary: #4F46E5;        /* Indigo-600 */
    --nskit-primary-hover: #4338CA;  /* Indigo-700 */
    --nskit-primary-light: #EEF2FF;  /* Indigo-50 */

    --nskit-secondary: #6366F1;      /* Indigo-500 */
    --nskit-success: #10B981;        /* Emerald-500 */
    --nskit-danger: #EF4444;         /* Red-500 */
    --nskit-warning: #F59E0B;        /* Amber-500 */
    --nskit-info: #3B82F6;           /* Blue-500 */

    /* Text Colors */
    --nskit-text-primary: #18181B;   /* Zinc-900 */
    --nskit-text-secondary: #71717A; /* Zinc-500 */
    --nskit-text-disabled: #A1A1AA;  /* Zinc-400 */
    --nskit-text-muted: #52525B;     /* Zinc-600 */

    /* Background Colors */
    --nskit-bg-primary: #FFFFFF;
    --nskit-bg-secondary: #FAFAFA;   /* Zinc-50 */
    --nskit-bg-tertiary: #F4F4F5;    /* Zinc-100 */
    --nskit-bg-hover: #F9FAFB;       /* Gray-50 */

    /* Border Colors */
    --nskit-border-color: #E4E4E7;   /* Zinc-200 */
    --nskit-border-hover: #D4D4D8;   /* Zinc-300 */
    --nskit-divider-color: #F4F4F5;  /* Zinc-100 */

    /* Widget (Float UI 스타일) */
    --nskit-widget-border: 1px solid var(--nskit-border-color);
    --nskit-widget-border-hover: 1px solid var(--nskit-border-hover);
    --nskit-widget-radius: 8px;      /* rounded-lg */
    --nskit-widget-radius-sm: 6px;   /* rounded-md */
    --nskit-widget-radius-lg: 12px;  /* rounded-xl */
    --nskit-widget-padding: 12px 16px;
    --nskit-widget-focus-ring: 0 0 0 3px rgba(79, 70, 229, 0.1);  /* Indigo ring */

    /* Icon (표준화) */
    --nskit-icon-size: 24px;         /* 외부 박스 */
    --nskit-icon-padding: 2px;       /* 내부 패딩 */
    --nskit-icon-actual: 20px;       /* 실제 아이콘 */

    /* Dialog */
    --nskit-dialog-bg: #FFFFFF;
    --nskit-dialog-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --nskit-dialog-radius: 12px;     /* rounded-xl */
    --nskit-dialog-padding: 24px;

    /* Page */
    --nskit-page-bg: #FAFAFA;        /* Zinc-50 */
    --nskit-page-header-height: 64px;
    --nskit-page-header-bg: #FFFFFF;

    /* Spacing (Float UI 시스템) */
    --nskit-spacing-0: 0;
    --nskit-spacing-1: 4px;
    --nskit-spacing-2: 8px;
    --nskit-spacing-3: 12px;
    --nskit-spacing-4: 16px;
    --nskit-spacing-5: 20px;
    --nskit-spacing-6: 24px;
    --nskit-spacing-8: 32px;
    --nskit-spacing-10: 40px;
    --nskit-spacing-12: 48px;

    /* Typography (Spoqa Han Sans + Float UI) */
    --nskit-font-family: 'Spoqa Han Sans Neo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --nskit-font-size-xs: 12px;      /* text-xs */
    --nskit-font-size-sm: 14px;      /* text-sm */
    --nskit-font-size-base: 16px;    /* text-base */
    --nskit-font-size-lg: 18px;      /* text-lg */
    --nskit-font-size-xl: 20px;      /* text-xl */
    --nskit-font-size-2xl: 24px;     /* text-2xl */
    --nskit-font-size-3xl: 30px;     /* text-3xl */

    --nskit-font-weight-normal: 400;
    --nskit-font-weight-medium: 500;
    --nskit-font-weight-semibold: 600;
    --nskit-font-weight-bold: 700;

    --nskit-line-height-tight: 1.25;
    --nskit-line-height-normal: 1.5;
    --nskit-line-height-relaxed: 1.75;

    /* Z-Index (레이어 순서: page → dialog → page-super → panel → dialog-super) */
    --nskit-z-base: 1;
    --nskit-z-header: 100;
    --nskit-z-gnb: 100;
    --nskit-z-scene: 10;
    --nskit-z-dim: 19999;
    --nskit-z-page: 20000;
    --nskit-z-dialog: 30000;
    --nskit-z-page-super: 40000;
    --nskit-z-panel: 50000;
    --nskit-z-dialog-super: 60000;  /* = System Dialog */

    /* Shadow (Float UI) */
    --nskit-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --nskit-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --nskit-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --nskit-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --nskit-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    /* Transition */
    --nskit-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --nskit-transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --nskit-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Typography (Spoqa Han Sans + Float UI)
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--nskit-font-weight-bold);
    line-height: var(--nskit-line-height-tight);
    margin: 0;
    color: var(--nskit-text-primary);
}

h1 { font-size: var(--nskit-font-size-3xl); }
h2 { font-size: var(--nskit-font-size-2xl); }
h3 { font-size: var(--nskit-font-size-xl); }
h4 { font-size: var(--nskit-font-size-lg); }
h5 { font-size: var(--nskit-font-size-base); }
h6 { font-size: var(--nskit-font-size-sm); }

p {
    margin: 0 0 var(--nskit-spacing-4) 0;
    line-height: var(--nskit-line-height-relaxed);
    color: var(--nskit-text-secondary);
}

a {
    color: var(--nskit-primary);
    text-decoration: none;
    transition: color var(--nskit-transition-fast);
}

a:hover {
    color: var(--nskit-primary-hover);
    text-decoration: none;
}

/* ============================================
   Buttons (Float UI 스타일)
   ============================================ */

button, .btn {
    font-family: inherit;
    font-size: var(--nskit-font-size-sm);
    font-weight: var(--nskit-font-weight-semibold);
    padding: 10px 20px;
    border: none;
    border-radius: var(--nskit-widget-radius);
    cursor: pointer;
    transition: all var(--nskit-transition-base);
    line-height: var(--nskit-line-height-tight);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

button:hover, .btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

button:active, .btn:active {
    transform: translateY(0);
}

button:disabled, .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background-color: var(--nskit-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--nskit-primary-hover);
}

.btn-secondary {
    background-color: white;
    color: var(--nskit-text-primary);
    border: 1px solid var(--nskit-border-color);
}

.btn-secondary:hover {
    background-color: var(--nskit-bg-hover);
    border-color: var(--nskit-border-hover);
}

.btn-success {
    background-color: var(--nskit-success);
    color: white;
}

.btn-danger {
    background-color: var(--nskit-danger);
    color: white;
}

/* ============================================
   Utilities
   ============================================ */

.hide {
    display: none !important;
}

.show {
    display: block !important;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--nskit-spacing-xs) !important; }
.mt-2 { margin-top: var(--nskit-spacing-sm) !important; }
.mt-3 { margin-top: var(--nskit-spacing-md) !important; }
.mt-4 { margin-top: var(--nskit-spacing-lg) !important; }
.mt-5 { margin-top: var(--nskit-spacing-xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--nskit-spacing-xs) !important; }
.mb-2 { margin-bottom: var(--nskit-spacing-sm) !important; }
.mb-3 { margin-bottom: var(--nskit-spacing-md) !important; }
.mb-4 { margin-bottom: var(--nskit-spacing-lg) !important; }
.mb-5 { margin-bottom: var(--nskit-spacing-xl) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--nskit-spacing-xs) !important; }
.p-2 { padding: var(--nskit-spacing-sm) !important; }
.p-3 { padding: var(--nskit-spacing-md) !important; }
.p-4 { padding: var(--nskit-spacing-lg) !important; }
.p-5 { padding: var(--nskit-spacing-xl) !important; }