/* common.css */

/* 1. Root Variables */
:root {
    --color-bg: #ffffff;
    --color-text: #000000;
    --color-black: #000000;
    --color-white: #ffffff;

    --color-primary: #000000;
    --color-secondary: #444444;
    --color-accent: #f5f5f5;

    --color-orangered: #ff4500;
    --color-highlight: #ff6b35;
    --color-success: #4caf50;
    --color-info: #2196f3;
    --color-warning: #ff9800;
    --color-error: #f44336;

    --color-slot-bg: #f8f8f8;
    --color-slot-hover: #e3f2fd;
    --color-slot-selected: #bbdefb;

    --transition-fast: 0.3s ease;
    --border-radius: 8px;

    --g-gap: 18px;
    --card-radius: 14px;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* 2. Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* 3. Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 0.5em;
}

p {
    margin-bottom: 1em;
}

/* 4. Links */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-highlight);
}

/* 5. Buttons */
.btn {
    display: inline-block;
    padding: 0.6em 1.2em;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    text-align: center;
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

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

/* Secondary Button */
.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-black);
}

/* Accent Button */
.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-black);
}

.btn-accent:hover {
    background-color: var(--color-slot-hover);
}

/* Status Buttons */
.btn-info {
    background-color: var(--color-info);
    color: var(--color-white);
}

.btn-info:hover {
    background-color: #1976d2;
}

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

.btn-success:hover {
    background-color: #388e3c;
}

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

.btn-warning:hover {
    background-color: #f57c00;
}

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

.btn-error:hover {
    background-color: #d32f2f;
}

/* 6. Card Common */
.card {
    background-color: var(--color-white);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    padding: 1.2em;
    transition: all var(--transition-fast);
}

.card:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

/* 7. Utility Classes */
.text-center {
    text-align: center;
}

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

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

.mt-1 {
    margin-top: 0.5em;
}

.mt-2 {
    margin-top: 1em;
}

.mt-3 {
    margin-top: 1.5em;
}

.mb-1 {
    margin-bottom: 0.5em;
}

.mb-2 {
    margin-bottom: 1em;
}

.mb-3 {
    margin-bottom: 1.5em;
}

.p-1 {
    padding: 0.5em;
}

.p-2 {
    padding: 1em;
}

.p-3 {
    padding: 1.5em;
}