/* --- 1. MODERN RESET & FONTS --- */

:root {
    --primary: #059669;       /* Emerald 600 */
    --primary-hover: #047857; /* Emerald 700 */
    --accent: #10b981;        /* Emerald 500 */
    --dark: #0f172a;          /* Slate 900 */
    --gray-dark: #334155;     /* Slate 700 */
    --gray-light: #f1f5f9;    /* Slate 100 */
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.9);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: #f8fafc;
    color: var(--dark);
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

/* --- 2. HEADER (Glassmorphism) --- */
header {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.5px;
}

.logo i { color: var(--accent); font-size: 1.4rem; }

nav a {
    text-decoration: none;
    color: var(--gray-dark);
    font-weight: 600;
    font-size: 0.95rem;
    margin-left: 32px;
    transition: color 0.2s;
}

nav a:hover { color: var(--primary); }

/* --- 3. HERO & CALCULATOR GRID --- */
.hero-section {
    padding: 60px 0 100px;
    background: radial-gradient(circle at top right, #d1fae5 0%, transparent 40%);
}

.hero-title {
    text-align: center;
    margin-bottom: 50px;
}

.hero-title h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--gray-dark) 100%);
    -webkit-background-clip: text;
    background-clip: text;  /* 👈 هذا هو السطر الجديد الذي أضفناه */
    -webkit-text-fill-color: transparent;
}

.hero-title p {
    font-size: 1.1rem;
    color: var(--gray-dark);
    max-width: 600px;
    margin: 0 auto;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

/* --- 4. INPUT CARD (Clean & Modern) --- */
.card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0,0,0,0.05);
}

.input-group { margin-bottom: 24px; }
.input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-dark);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper i {
    position: absolute;
    left: 16px;
    color: #94a3b8;
}

.input-wrapper input {
    width: 100%;
    padding: 16px 16px 16px 48px; /* Space for icon */
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    transition: all 0.2s;
}

.input-wrapper input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
    outline: none;
}

/* Range Slider */
input[type=range] {
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 5px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;    /* 👈 هذا هو السطر الجديد */
    margin-top: 10px;
    padding: 0;
    border: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.1); }

.btn-primary {
    width: 100%;
    padding: 18px;
    background: var(--dark);
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    margin-top: 10px;
}

.btn-primary:hover {
    background: #1e293b;
    transform: translateY(-2px);
}

/* --- 5. RESULT CARD (Dark Theme) --- */
.result-card {
    background: var(--dark);
    color: white;
    position: sticky;
    top: 100px;
    padding: 48px;
}

.result-item {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.result-item:last-child { border: none; margin: 0; padding: 0; }

.result-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.6;
    margin-bottom: 10px;
    display: block;
}

.result-value {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -2px;
    display: block;
}

.text-green { color: var(--accent); }

/* --- 6. SEO CONTENT (Grid Layout) --- */
.content-section {
    padding: 80px 0;
    background: white;
}

.article-container {
    max-width: 900px;
    margin: 0 auto;
}

.article-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
}

.feature-block {
    display: flex;
    gap: 24px;
    align-items: start;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: #d1fae5;
    color: var(--primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-text h3 { margin: 0 0 10px 0; font-size: 1.5rem; }
.feature-text p { color: var(--gray-dark); line-height: 1.7; margin: 0; }

/* --- 7. RESPONSIVE --- */
@media (max-width: 1024px) {
    .calc-grid { grid-template-columns: 1fr; gap: 20px; }
    .hero-title h1 { font-size: 2.5rem; }
    .result-card { position: static; margin-top: 30px; }
    .btn-primary { padding: 16px; }
}

@media (max-width: 768px) {
    .header-content { flex-direction: column; gap: 15px; }
    nav a { margin: 0 10px; }
    .hero-section { padding: 40px 0; }
    .card { padding: 24px; }
    .result-value { font-size: 2.5rem; }
}

/* =========================================
   تأثيرات الفوتر (تمت إضافتها حديثاً)
   ========================================= */

/* جعل حركة جميع روابط الفوتر ناعمة */
footer a {
    transition: all 0.3s ease;
    display: inline-block; /* مهم لكي يعمل التحرك للأعلى */
}

/* عند مرور الماوس على روابط القوائم: يتغير اللون ويتحرك لليمين */
footer ul li a:hover {
    color: var(--primary) !important;
    padding-left: 5px;
}

/* عند مرور الماوس على اللوجو في الفوتر: يرتفع للأعلى قليلاً بدلاً من اليمين */
footer h3 a:hover {
    color: var(--primary) !important;
    padding-left: 0;      /* إلغاء الحركة الجانبية للوجو */
    transform: translateY(-3px); /* رفعه للأعلى */
}