:root {
    /* نظام ألوان متكامل */
    --primary-color: #4361ee;
    --primary-hover: #3a56d4;
    --success-color: #4cc9f0;
    --success-hover: #38b6db;
    --danger-color: #f72585;
    --danger-hover: #e5177e;
    --text-primary: #2b2d42;
    --text-secondary: #6c757d;
    --bg-light: #f8f9fa;
    --bg-dark: #212529;
    --border-radius: 12px;
    --box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.1);
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
    --focus-ring: 0 0 0 3px rgba(67, 97, 238, 0.3);
}

/* نظام خطوط متدرج */
:root {
    --font-size-xs: clamp(0.75rem, 0.75vw, 0.85rem);
    --font-size-sm: clamp(0.875rem, 1vw, 1rem);
    --font-size-md: clamp(1rem, 1.25vw, 1.25rem);
    --font-size-lg: clamp(1.25rem, 1.5vw, 1.5rem);
    --font-size-xl: clamp(1.5rem, 2vw, 2rem);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 0;
}

/* نظام حاويات ذكي */
.container {
    width: 100%;
    max-width: min(1400px, 95vw);
    margin: 2rem auto;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

    .container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 4px;
        height: 100%;
        background: linear-gradient(to bottom, var(--primary-color), var(--success-color));
    }

    /* تحسينات العناوين */
    .container h2 {
        font-size: var(--font-size-lg);
        color: var(--text-primary);
        margin-bottom: clamp(1.25rem, 3vw, 2rem);
        text-align: center;
        position: relative;
        font-weight: 700;
        letter-spacing: -0.5px;
    }

        .container h2::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--success-color));
            margin: 0.75rem auto 0;
            border-radius: 2px;
        }

/* نظام النماذج الذكي */
.form-group {
    margin-bottom: clamp(1.25rem, 2vw, 1.75rem);
    position: relative;
}

    .form-group label {
        display: block;
        margin-bottom: 0.75rem;
        font-size: var(--font-size-sm);
        color: var(--text-secondary);
        font-weight: 500;
        transition: var(--transition);
    }

    .form-group input[type="date"] {
        width: 100%;
        padding: clamp(0.75rem, 1.25vw, 1rem) clamp(1rem, 1.5vw, 1.25rem);
        font-size: var(--font-size-sm);
        border: 1px solid #e0e3e9;
        border-radius: var(--border-radius);
        transition: var(--transition);
        background-color: #f9fafc;
        color: var(--text-primary);
        font-family: inherit;
    }

        .form-group input[type="date"]:focus {
            border-color: var(--primary-color);
            outline: none;
            box-shadow: var(--focus-ring);
            background-color: white;
        }

        .form-group input[type="date"]:hover {
            border-color: #b8c2cc;
        }

/* نظام الأزرار الذكي */
.save-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: clamp(0.75rem, 1.25vw, 1rem) clamp(1.25rem, 2vw, 1.5rem);
    background: linear-gradient(135deg, var(--success-color), var(--primary-color));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    cursor: pointer;
    width: 100%;
    margin-top: 1.5rem;
    transition: var(--transition);
    font-weight: 600;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

    .save-btn::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 0;
        height: 100%;
        background: linear-gradient(135deg, var(--primary-color), var(--success-color));
        transition: var(--transition);
        z-index: -1;
    }

    .save-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    }

        .save-btn:hover::before {
            width: 100%;
        }

    .save-btn:active {
        transform: translateY(0);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }

    .save-btn i {
        font-size: 1.1em;
    }

/* نظام الجداول الذكي */
.gridview {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 2rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    background-color: white;
}

.gridview-header {
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    color: white;
    text-align: center;
    font-weight: 600;
}

    .gridview-header th {
        padding: clamp(0.75rem, 1.25vw, 1rem);
        font-size: var(--font-size-sm);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        position: relative;
    }

        .gridview-header th:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 50%;
            right: 0;
            transform: translateY(-50%);
            width: 1px;
            height: 60%;
            background-color: rgba(255, 255, 255, 0.3);
        }

.gridview-body tr {
    transition: var(--transition);
    border-bottom: 1px solid #f1f3f5;
}

    .gridview-body tr:last-child {
        border-bottom: none;
    }

    .gridview-body tr:nth-child(even) {
        background-color: #f9fafc;
    }

    .gridview-body tr:hover {
        background-color: #f1f5f9;
        transform: scale(1.005);
    }

.gridview td {
    padding: clamp(0.75rem, 1.25vw, 1rem);
    text-align: center;
    vertical-align: middle;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

/* أزرار الجداول */
.delete-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    font-size: var(--font-size-xs);
}

    .delete-button:hover {
        background-color: var(--danger-hover);
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(247, 37, 133, 0.2);
    }

    .delete-button:active {
        transform: translateY(0);
    }

/* نظام التخطيط الذكي */
.form-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
}

/* نظام الظلام التلقائي */
@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--bg-dark);
        color: #e8e8f0;
    }

    .container {
        background-color: #2b2d42;
        box-shadow: 0 12px 24px -6px rgba(0, 0, 0, 0.3);
    }

    .form-group input[type="date"] {
        background-color: #343a40;
        border-color: #495057;
        color: #f8f9fa;
    }

    .gridview {
        background-color: #2b2d42;
    }

    .gridview-body tr {
        border-bottom-color: #495057;
    }

        .gridview-body tr:nth-child(even) {
            background-color: #343a40;
        }

        .gridview-body tr:hover {
            background-color: #3d434a;
        }

    .gridview td {
        color: #e9ecef;
    }
}

/* تحسينات للطباعة */
@media print {
    body {
        background-color: white !important;
        color: black !important;
        padding: 0 !important;
    }

    .container {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 1rem !important;
    }

    .save-btn, .delete-button {
        display: none !important;
    }

    .gridview {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* تأثيرات الحركة */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container {
    animation: fadeIn 0.5s ease-out;
}

/* نظام التجاوب الذكي */
@media (max-width: 1200px) {
    .container {
        max-width: 95vw;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1.25rem;
        margin: 1rem auto;
    }

    .gridview {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }
}

@media (max-width: 480px) {
    :root {
        --border-radius: 10px;
    }

    .container {
        padding: 1rem;
        margin: 0.5rem auto;
        border-radius: 0;
    }

    .form-container {
        grid-template-columns: 1fr;
    }
}

/* ميزات إضافية ذكية */
.form-group.focused label {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.form-group.has-error input {
    border-color: var(--danger-color);
}

.form-group.has-error label {
    color: var(--danger-color);
}

.form-group.has-success input {
    border-color: var(--success-color);
}

.form-group.has-success label {
    color: var(--success-color);
}

/* تأثيرات لمسية للجوال */
@media (hover: none) {
    .save-btn:hover {
        transform: none;
        box-shadow: none;
    }

    .gridview-body tr:hover {
        transform: none;
    }
}