:root {
    --bg-main: #f3f3f3;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(0, 0, 0, 0.08);
    --text-primary: #1b1b1b;
    --text-secondary: #5d5d5d;
    --accent: #005fb8;
    --accent-hover: #024e96;
    --header-bg: rgba(255, 255, 255, 0.85);
    --footer-bg: rgba(255, 255, 255, 0.85);
    --input-bg: #ffffff;
    --input-border: #d1d1d1;
    --table-header: #f8f9fa;
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] {
    --bg-main: #1c1c1c;
    --card-bg: rgba(32, 32, 32, 0.85);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #adadad;
    --accent: #60cdff;
    --accent-hover: #47b2e5;
    --header-bg: rgba(32, 32, 32, 0.85);
    --footer-bg: rgba(32, 32, 32, 0.85);
    --input-bg: #2d2d2d;
    --input-border: #454545;
    --table-header: #2b2b2b;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

body {
    font-family: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    font-size: 16px;
    background-color: var(--bg-main);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* Container & Layout */
.container {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 85px 24px 24px 24px;
    box-sizing: border-box;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    transition: all 0.2s ease;
}

.card h3 {
    margin-top: 0;
    color: var(--accent);
    font-size: 18px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 10px;
}

/* Forms & Controls */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 13px; }

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-primary);
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(0, 95, 184, 0.2);
}

.row { display: flex; gap: 15px; }
.col { flex: 1; }

/* Buttons */
.btn {
    padding: 9px 18px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn:hover { background: var(--accent-hover); }
.btn-success { background: #107c41; color: #fff; }
.btn-success:hover { background: #0b582e; }
.btn-danger { background: #c42b1c; color: #fff; }
.btn-danger:hover { background: #9e2216; }
.btn-warning { background: #fce100; color: #000; }

table { width: 100%; border-collapse: collapse; margin-top: 15px; font-size: 14px; }
table, th, td { border: 1px solid var(--card-border); }
th, td { padding: 12px; text-align: left; }
th { background: var(--table-header); color: var(--text-primary); font-weight: 600; }

.error { color: #f25555; font-weight: bold; margin-bottom: 15px; }
.success { color: #23a059; font-weight: bold; margin-bottom: 15px; }

/* Dynamic Windows 11 Fluent UI Modal System */
.fluent-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s cubic-bezier(0, 0, 0, 1), visibility 0.25s;
}

.fluent-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.fluent-modal-dialog {
    background: var(--card-bg, #ffffff);
    border: 1px solid var(--card-border, rgba(255, 255, 255, 0.2));
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.22);
    border-radius: 12px;
    width: 100%;
    max-width: 850px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 24px;
    transform: scale(0.94) translateY(12px);
    transition: transform 0.25s cubic-bezier(0.1, 0.9, 0.2, 1);
    box-sizing: border-box;
}

.fluent-modal-overlay.active .fluent-modal-dialog {
    transform: scale(1) translateY(0);
}

.fluent-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border, #eee);
    padding-bottom: 12px;
    margin-bottom: 20px;
}

.fluent-modal-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--accent, #005fb8);
}

.fluent-modal-close {
    background: transparent;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--text-secondary, #666);
    line-height: 1;
    padding: 4px 8px;
    border-radius: 4px;
}

.fluent-modal-close:hover {
    background: rgba(0, 0, 0, 0.08);
}