/* إعادة تعيين التنسيقات الأساسية */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

/* شريط التنقل (Header) */
.navbar {
    background-color: #1e293b;
    color: #fff;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo span {
    color: #38bdf8;
}

.navbar nav a {
    color: #fff;
    text-decoration: none;
    margin-right: 15px;
    font-weight: 500;
}

/* واجهة البحث (Hero Section) */
.hero {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: #fff;
    text-align: center;
    padding: 3rem 1rem;
}

.hero h2 {
    margin-bottom: 10px;
    font-size: 2rem;
}

.hero p {
    margin-bottom: 20px;
    color: #94a3b8;
}

.hero input {
    width: 100%;
    max-width: 500px;
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* المساحات الإعلانية */
.ad-slot {
    margin: 20px auto;
    padding: 15px;
    background-color: #e2e8f0;
    border: 2px dashed #cbd5e1;
    border-radius: 8px;
    text-align: center;
    color: #64748b;
}

/* شبكة الحاسبات */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.calc-card {
    background-color: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.calc-card h3 {
    margin-bottom: 15px;
    color: #0f172a;
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 8px;
}

/* عناصر الإدخال والأزرار العامة */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 1rem;
}

.btn-action {
    width: 100%;
    padding: 10px;
    background-color: #0284c7;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-action:hover {
    background-color: #0369a1;
}

.result-box {
    margin-top: 15px;
    padding: 10px;
    border-radius: 6px;
    font-weight: bold;
    text-align: center;
    display: none;
}

/* تنسيق الحاسبة العامة */
#calcDisplay {
    width: 100%;
    height: 45px;
    font-size: 1.5rem;
    text-align: right;
    padding: 5px 10px;
    margin-bottom: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    background-color: #f8fafc;
}

.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.calc-buttons button {
    padding: 12px;
    font-size: 1.1rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    background-color: #f1f5f9;
    cursor: pointer;
    font-weight: 600;
}

.calc-buttons button:hover {
    background-color: #e2e8f0;
}

.calc-buttons .btn-equal {
    background-color: #10b981;
    color: white;
    grid-row: span 2;
    height: 100%;
}

.calc-buttons .btn-equal:hover {
    background-color: #059669;
}

.calc-buttons .btn-zero {
    grid-column: span 2;
}

/* الفوتر */
footer {
    background-color: #0f172a;
    color: #94a3b8;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}