/* =================================
    CSS VARIABLES (Light & Dark Mode)
    ================================= */
:root {
    /* Light Mode */
    --body-background: #f8f8f8;
    --main-text-color: #555;
    --heading-color: #333;
    --card-background: #fff;
    --card-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    --card-border: #e0e0e0;
    --game-card-bg: #f8f8f8;
    --game-card-hover-bg: #fff;
    --game-card-hover-border: orange;
    --game-label-color: #333;
    --game-value-color: #555;
    --separator-color: #ccc;
    --filter-header-bg: #f7f7f7;
    --filter-header-hover-bg: #eee;
    --filter-link-hover-bg: #f0f8ff;
    --button-primary-bg: #0066cc;
    --button-primary-hover: #005fa3;
    --input-border: #ccc;
    --input-focus-border: #0066cc;
}

/* Dark Mode - Activated by System Preference */
@media (prefers-color-scheme: dark) {
    :root {
        --body-background: #1a1a1a;
        --main-text-color: #ccc;
        --heading-color: #e0e0e0;
        --card-background: #2a2a2a;
        --card-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
        --card-border: #333;
        --game-card-bg: #222;
        --game-card-hover-bg: #111;
        --game-card-hover-border: orange;
        --game-label-color: #e0e0e0;
        --game-value-color: #ccc;
        --separator-color: #555;
        --filter-header-bg: #282828;
        --filter-header-hover-bg: #333;
        --filter-link-hover-bg: #2a3a4a;
        --button-primary-bg: #79a1d1;
        --button-primary-hover: #5580a8;
        --input-border: #444;
        --input-focus-border: #79a1d1;
    }
}

body[data-theme='dark'] {
    /* Manual Dark Mode Override */
    --body-background: #1a1a1a;
    --main-text-color: #ccc;
    --heading-color: #e0e0e0;
    --card-background: #2a2a2a;
    --card-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    --card-border: #333;
    --game-card-bg: #222;
    --game-card-hover-bg: #111;
    --game-card-hover-border: orange;
    --game-label-color: #e0e0e0;
    --game-value-color: #ccc;
    --separator-color: #555;
    --filter-header-bg: #282828;
    --filter-header-hover-bg: #333;
    --filter-link-hover-bg: #2a3a4a;
    --button-primary-bg: #79a1d1;
    --button-primary-hover: #5580a8;
    --input-border: #444;
    --input-focus-border: #79a1d1;
}

/* =================================
    LAYOUT & MAIN STRUCTURE
    ================================= */
.content-offset {
    padding-top: 170px;
    min-height: 100vh;
    background: var(--body-background);
    transition: background-color 0.3s ease;
}

.wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 20px 100px 20px;
}

/* Header Section */
.header-section {
    background: var(--card-background);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: var(--card-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header-section h1 {
    font-size: 28px;
    color: var(--heading-color);
    margin: 0 0 20px 0;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 15px;
    transition: color 0.3s ease;
}

.header-section form {
    margin: 0;
}

.header-section select {
    width: 100%;
    max-width: 400px;
    padding: 12px 15px;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    background: var(--card-background);
    color: var(--main-text-color);
    font-size: 14px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.3s ease;
}

.header-section select:hover {
    border-color: var(--input-focus-border);
}

.header-section select:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

/* Search Input */
#search {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 20px;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    background: var(--card-background);
    color: var(--main-text-color);
    font-size: 14px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: border-color 0.2s ease, background-color 0.3s ease;
}

#search:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

#search::placeholder {
    color: var(--game-value-color);
    opacity: 0.7;
}

/* =================================
    TABLE STYLES
    ================================= */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-background);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

thead {
    background: var(--filter-header-bg);
    transition: background-color 0.3s ease;
}

th {
    padding: 15px 20px;
    text-align: left;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--heading-color);
    border-bottom: 2px solid var(--card-border);
    transition: color 0.3s ease;
}

td {
    padding: 15px 20px;
    border-bottom: 1px solid var(--separator-color);
    text-align: left;
    color: var(--main-text-color);
    transition: color 0.3s ease;
}

.rom-row {
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.rom-row:hover {
    background: var(--filter-link-hover-bg);
}

.rom-row td {
    font-size: 14px;
}

.rom-row td:first-child {
    font-weight: 500;
    color: var(--game-label-color);
}

/* Region Pill */
.region-pill {
    display: inline-block;
    background: var(--game-card-bg);
    color: var(--main-text-color);
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid var(--card-border);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* =================================
    FORM ROW (EXPANDABLE SECTION)
    ================================= */
.form-row {
    display: none;
    background: var(--game-card-bg);
    transition: background-color 0.3s ease;
}

.form-row td {
    padding: 0;
    border-bottom: 2px solid var(--separator-color);
}

/* =================================
    QUALIFIER UI BOX
    ================================= */
.qualifier-ui-box {
    margin: 0;
    padding: 30px;
    background: var(--card-background);
    border-top: 3px solid var(--game-card-hover-border);
    transition: background-color 0.3s ease;
}

/* =================================
    FORM GRID LAYOUT
    ================================= */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

/* =================================
    UI SECTIONS (CARDS)
    ================================= */
.ui-section {
    background: var(--game-card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 20px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.ui-section.full-width {
    grid-column: span 2;
}

/* Section Accent Borders */
.global-mark {
    border-left: 4px solid var(--button-primary-bg);
}

.release-mark {
    border-left: 4px solid var(--game-card-hover-border);
}

/* Section Label */
.section-label {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--game-value-color);
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--separator-color);
    transition: color 0.3s ease;
}

/* =================================
    FORM FIELDS
    ================================= */
.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--game-label-color);
    transition: color 0.3s ease;
}

/* Field Split (Side by Side) */
.field-split {
    display: flex;
    gap: 15px;
}

.field-split .field {
    flex: 1;
}

/* Input & Select Styling */
select,
input[type="text"] {
    padding: 10px 12px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    background: var(--card-background);
    color: var(--main-text-color);
    font-size: 14px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: border-color 0.2s ease, background-color 0.3s ease, box-shadow 0.2s ease;
}

select:hover,
input[type="text"]:hover {
    border-color: var(--input-focus-border);
}

select:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

input[type="text"]::placeholder {
    color: var(--game-value-color);
    opacity: 0.6;
}

/* =================================
    RADIO GROUPS
    ================================= */
.radio-group {
    margin-bottom: 16px;
}

.radio-group > label {
    font-size: 13px;
    font-weight: 600;
    color: var(--game-label-color);
    margin-bottom: 8px;
    display: block;
    transition: color 0.3s ease;
}

.radios {
    display: flex;
    gap: 20px;
    padding: 8px 0;
}

.radios label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    color: var(--main-text-color);
    transition: color 0.2s ease;
}

.radios label:hover {
    color: var(--button-primary-bg);
}

.radios input[type="radio"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
    accent-color: var(--button-primary-bg);
}

/* =================================
    CHECKBOX GRID
    ================================= */
.check-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 8px 0;
}

.check-grid label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: var(--main-text-color);
    padding: 6px;
    border-radius: 4px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.check-grid label:hover {
    background: var(--filter-header-bg);
    color: var(--button-primary-bg);
}

.check-grid input[type="checkbox"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
    accent-color: var(--button-primary-bg);
}

/* =================================
    SUBMIT BUTTON
    ================================= */
.form-submit-bar {
    margin-top: 30px;
    text-align: right;
    padding-top: 20px;
    border-top: 1px solid var(--separator-color);
}

.confirm-btn {
    background: var(--button-primary-bg);
    color: #fff;
    border: none;
    padding: 14px 35px;
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.confirm-btn:hover {
    background: var(--button-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.confirm-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* =================================
    RESPONSIVE DESIGN
    ================================= */
@media (max-width: 900px) {
    .wrapper {
        padding: 15px 15px 80px 15px;
    }

    .form-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .ui-section.full-width {
        grid-column: span 1;
    }

    .check-grid {
        grid-template-columns: 1fr;
    }

    .field-split {
        flex-direction: column;
        gap: 0;
    }

    .qualifier-ui-box {
        padding: 20px;
    }

    th, td {
        padding: 12px 15px;
    }

    .header-section h1 {
        font-size: 24px;
    }
}

@media (max-width: 600px) {
    .radios {
        flex-direction: column;
        gap: 10px;
    }

    .confirm-btn {
        width: 100%;
        padding: 16px;
    }

    .form-submit-bar {
        text-align: center;
    }
}