/* إعادة تعيين أساسية */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* المتغيرات */
:root {
    --bg-black: #000000;
    --navy-primary: #1e3a8a;
    --navy-light: #2563eb;
    --white: #ffffff;
    --gray-light: #9ca3af;
    --gray-dark: #374151;
    --card-bg: #111827;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.5);
}

/* الجسم العام */
body {
    font-family: 'Cairo', sans-serif;
    background-color: var(--bg-black);
    color: var(--white);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    padding: 0;
    margin: 0;
    /* منع التكبير على الموبايل */
    touch-action: manipulation;
}

/* الحاوية الرئيسية */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    padding-bottom: 40px;
}

/* الرأس */
.app-header {
    text-align: center;
    margin-bottom: 30px;
    padding-top: 20px;
}

.app-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--white);
}

.subtitle {
    font-size: 1rem;
    color: var(--gray-light);
    font-weight: 400;
}

/* نموذج الإدخال */
.input-form {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    font-family: 'Cairo', sans-serif;
    background: var(--bg-black);
    border: 2px solid var(--gray-dark);
    border-radius: 12px;
    color: var(--white);
    transition: all 0.3s ease;
    -webkit-appearance: none;
    appearance: none;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--navy-light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.input-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 16px center;
    padding-left: 40px;
}

/* زر الحساب */
.btn-calculate {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: 'Cairo', sans-serif;
    background: linear-gradient(135deg, var(--navy-primary), var(--navy-light));
    color: var(--white);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    margin-top: 10px;
}

.btn-calculate:active {
    transform: scale(0.97);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.btn-calculate:hover {
    background: linear-gradient(135deg, var(--navy-light), var(--navy-primary));
}

/* قسم النتائج */
.results-section {
    animation: fadeIn 0.6s ease;
}

.results-section.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* بطاقة النتائج */
.result-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.result-card h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--white);
    text-align: center;
}

/* قيمة السعرات */
.calories-value {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    color: var(--navy-light);
    margin: 16px 0;
}

.result-label {
    text-align: center;
    font-size: 1rem;
    color: var(--gray-light);
}

/* شبكة الماكروز */
.macros-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 16px;
}

.macro-item {
    text-align: center;
    padding: 16px 8px;
    background: var(--bg-black);
    border-radius: 12px;
    transition: transform 0.2s ease;
}

.macro-item:active {
    transform: scale(0.95);
}

.macro-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.macro-label {
    font-size: 0.85rem;
    color: var(--gray-light);
    margin-bottom: 8px;
}

.macro-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 4px;
}

.macro-unit {
    font-size: 0.75rem;
    color: var(--gray-light);
}

/* حاوية التمارين */
.workouts-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

.workout-card {
    background: var(--bg-black);
    border-radius: 12px;
    padding: 16px;
    border-right: 4px solid var(--navy-light);
    transition: all 0.3s ease;
}

.workout-card:active {
    transform: translateX(-4px);
    box-shadow: var(--shadow);
}

.workout-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 6px;
}

.workout-details {
    font-size: 0.9rem;
    color: var(--gray-light);
}

/* زر إعادة الحساب */
.btn-reset {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Cairo', sans-serif;
    background: transparent;
    color: var(--gray-light);
    border: 2px solid var(--gray-dark);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-reset:active {
    transform: scale(0.97);
}

.btn-reset:hover {
    border-color: var(--navy-light);
    color: var(--navy-light);
}

/* تحسينات للموبايل */
@media (max-width: 480px) {
    .container {
        padding: 16px;
    }

    .app-header h1 {
        font-size: 2rem;
    }

    .calories-value {
        font-size: 2.5rem;
    }

    .macros-grid {
        gap: 12px;
    }

    .macro-value {
        font-size: 1.3rem;
    }
}

/* منع التمدد والتكبير على iOS */
input[type="number"],
input[type="text"],
select {
    font-size: 16px !important;
}

/* إخفاء الأسهم في حقول الأرقام */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}