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

:root {
    --black: #1a1a1a;
    --yellow: #f5e642;
    --bg: #f5fbfb;
    --white: #ffffff;
    --gray: #d6d6d6;
    --text: #222;
    --muted: #666;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Roboto Condensed', 'El Messiri', sans-serif;
    scrollbar-width: none;
    -ms-overflow-style: none;
    color: var(--text);
}

body::-webkit-scrollbar { display: none; }

ul { list-style: none; }

a {
    text-decoration: none;
    color: inherit;
}

img { max-width: 100%; display: block; }

/* ================================
   CONTAINER
   ================================ */
.container {
    width: 90%;
    max-width: 1170px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 15px;
    padding-right: 15px;
}

/* ================================
   SHARED COMPONENTS
   ================================ */
.heading {
    text-align: center;
    font-size: 28px;
    position: relative;
    padding-bottom: 20px;
}

.heading::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    height: 8px;
    width: 30%;
    background-color: var(--yellow);
    transform: translateX(-50%);
    transition: width 0.5s;
}

.heading::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -12px;
    height: 8px;
    width: 20%;
    background-color: var(--yellow);
    transform: translateX(-50%);
    transition: width 0.5s;
}

.heading:hover::before { width: 40%; }
.heading:hover::after  { width: 30%; }

.title {
    padding: 40px 0 30px;
    text-align: center;
}

.title h2 { font-size: 38px; margin-bottom: 10px; }
.title p  { font-size: 20px; line-height: 1.8; color: var(--muted); }

/* ================================
   HEADER
   ================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--white);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 8px 0;
}

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

/* logo */
.header .logo {
    position: relative;
    transition: 0.4s;
}

.header .logo a {
    font-weight: bold;
    font-size: 36px;
    font-style: italic;
    padding: 12px 10px 12px 4px;
    display: block;
    transition: color 0.3s;
}

.header .logo::before {
    content: '';
    position: absolute;
    height: 100%;
    background-color: var(--black);
    width: 0;
    transition: 0.4s;
    z-index: -1;
    transform: skew(-15deg);
}

.header .logo:hover a        { color: var(--white); }
.header .logo:hover::before  { width: 100%; }

/* nav */
.header .nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
}

.header .nav ul li { position: relative; }

.header .nav ul li a {
    padding: 20px 18px;
    font-size: 17px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    transition: 0.3s;
}

.header .nav ul li a i {
    transition: 0.4s;
}

.header .nav ul li a span {
    font-size: 15px;
    opacity: 0;
    max-width: 0;
    overflow: hidden;
    white-space: nowrap;
    transition: 0.4s;
    margin-right: 0;
}

.header .nav ul li:hover a i {
    transform: translateX(-4px) rotate(360deg);
}

.header .nav ul li:hover a span {
    opacity: 1;
    max-width: 120px;
    margin-right: 6px;
}

@media (max-width: 768px) {
    .header .container { flex-direction: column; gap: 8px; }
    .header .logo a    { font-size: 26px; }
    .header .nav ul    { flex-wrap: wrap; justify-content: center; }
    .header .nav ul li a { padding: 10px 12px; font-size: 15px; }
    .header .nav ul li a span { display: none; }
}

@media (max-width: 400px) {
    .header .nav ul li a { padding: 8px; font-size: 13px; }
    .header .nav ul li a i { font-size: 14px; }
}

/* ================================
   LANDING
   ================================ */
.landing .container {
    background-image: url(../imgs/landing.jpg);
    background-size: cover;
    background-position: center;
    min-height: 100vh;
    position: relative;
    width: 100%;
    max-width: 100%;
    padding: 0;
}

.landing .container::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: rgba(0,0,0,0.75);
}

.landing .container .text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 90%;
}

.landing .container .text h1 {
    color: var(--yellow);
    font-size: clamp(36px, 6vw, 70px);
    margin-bottom: 16px;
}

.landing .container .text p {
    color: var(--white);
    font-size: clamp(16px, 2.5vw, 22px);
    font-weight: bold;
    line-height: 1.6;
}

.landing .container .btn {
    position: absolute;
    left: 50%;
    bottom: 60px;
    transform: translateX(-50%);
}

.landing .container .btn a i {
    color: var(--yellow);
    font-size: 30px;
    animation: bouncing 1.5s infinite;
}

@keyframes bouncing {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40%, 60% { transform: translateY(-12px); }
}

/* ================================
   BENEFITS
   ================================ */
.benefits {
    padding: 80px 0 100px;
}

.benefits .container {
    padding-top: 60px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 30px;
    perspective: 600px;
    opacity: 0;
    transform: translateY(20px);
}

.benefits .container .card {
    text-align: center;
    position: relative;
    height: 280px;
    transform-style: preserve-3d;
    transition: transform 0.8s;
    cursor: pointer;
}

.benefits .container .card:hover { transform: rotateY(-180deg); }

.benefits .container .card .face {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 16px;
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    padding: 20px;
}

.benefits .container .card .front {
    background-color: var(--black);
    color: var(--yellow);
    font-size: 22px;
    font-weight: bold;
}

.benefits .container .card .front i { font-size: 52px; }

.benefits .container .card .back {
    background-color: var(--yellow);
    transform: rotateY(180deg);
    color: var(--black);
    font-size: 18px;
    font-weight: bold;
    line-height: 1.7;
}

@media (max-width: 600px) {
    .benefits .container {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .benefits .container .card { height: 220px; }
    .benefits .container .card .front { font-size: 16px; }
    .benefits .container .card .front i { font-size: 36px; }
    .benefits .container .card .back { font-size: 14px; }
}

@media (max-width: 360px) {
    .benefits .container { grid-template-columns: 1fr; }
}

/* ================================
   NUTRITION
   ================================ */
.nutrition {
    background-color: var(--bg);
    padding: 60px 0 80px;
}

.nutrition .container { padding-top: 60px; }

.nutrition .container .intro {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.nutrition .container .intro .text {
    direction: rtl;
    flex: 1;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.5s ease-in;
}

.nutrition .container .intro .text h1 { font-size: 38px; margin-bottom: 16px; }
.nutrition .container .intro .text p  { font-size: 18px; line-height: 2; }

.nutrition .container .intro .text.show-nutrition-text {
    opacity: 1;
    transform: translateX(0);
}

.nutrition .container .intro .image {
    flex-shrink: 0;
    opacity: 0;
    transform: translateX(60px);
    transition: all 0.5s ease-in;
}

.nutrition .container .intro .image img { width: 360px; }

/* boxes */
.nutrition .container .boxes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin: 20px 0 60px;
}

.nutrition .container .boxes .box {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-radius: 16px;
    border: 3px solid var(--black);
    padding: 24px 20px;
    background-color: var(--white);
}

.nutrition .container .boxes .box .icon {
    background-color: var(--black);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

.nutrition .container .boxes .box .icon i { color: var(--yellow); font-size: 26px; }

.nutrition .container .boxes .box .box-title h4 { font-size: 22px; margin-bottom: 10px; }
.nutrition .container .boxes .box .box-title p  { font-size: 15px; margin-bottom: 16px; color: var(--muted); }

.nutrition .container .boxes .box .content { width: 100%; display: flex; flex-direction: column; gap: 8px; }

.nutrition .container .boxes .box .content .content-box {
    background-color: #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    position: relative;
    overflow: hidden;
}

.nutrition .container .boxes .box .content .content-box::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: var(--yellow);
    width: 0;
    transition: 0.4s;
}

.nutrition .container .boxes .box .content .content-box:hover::before { width: 100%; }
.nutrition .container .boxes .box .content .content-box span,
.nutrition .container .boxes .box .content .content-box i { position: relative; z-index: 1; font-weight: bold; }
.nutrition .container .boxes .box .content .content-box:hover i { color: green; }

/* rate */
.rate { padding: 20px 0 60px; }

.rate .rate-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.rate .rate-content .progress {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.rate .rate-content .progress .progress-content {
    width: 100%;
    display: flex;
    flex-direction: row-reverse;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background-color: var(--gray);
    font-size: 18px;
    font-weight: bold;
    position: relative;
    overflow: hidden;
}

.rate .rate-content .progress .progress-content span { position: relative; z-index: 1; }

.rate .rate-content .progress .progress-bar {
    position: absolute;
    top: 0; left: 0;
    height: 100%;
    background-color: var(--yellow);
    border-radius: 0 16px 16px 0;
    transition: width 1s ease;
}

.rate .rate-content .image img { width: 360px; flex-shrink: 0; }

/* tips */
.tips { padding: 20px 0 40px; }

.tips .tips-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.tips .tips-content .box {
    text-align: center;
    padding: 28px 20px;
    border-radius: 16px;
    background-color: var(--white);
    box-shadow: 0 6px 16px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
    opacity: 0;
    transform: translateY(30px);
}

.tips .tips-content .box:hover {
    background-color: var(--yellow);
    transform: translateY(-4px);
}

.tips .tips-content .box i    { font-size: 32px; margin-bottom: 14px; }
.tips .tips-content .box h4   { font-size: 20px; margin-bottom: 10px; }
.tips .tips-content .box p    { font-size: 16px; line-height: 1.6; color: var(--muted); }

.tips .tips-content .box:hover p { color: var(--black); }

@media (max-width: 768px) {
    .nutrition .container .intro .image { display: none; }
    .rate .rate-content .image          { display: none; }
}

/* ================================
   WORKOUT
   ================================ */
.workout { padding: 60px 0 100px; }

.workout .container { padding-top: 60px; }

.workout .container .intro {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    margin-bottom: 20px;
}

.workout .intro .text {
    text-align: right;
    flex: 1;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.5s ease-in;
}

.workout .intro .text h1 { font-size: 38px; margin-bottom: 16px; }
.workout .intro .text p  { font-size: 18px; line-height: 1.8; }

.workout .intro .image {
    flex-shrink: 0;
    opacity: 0;
    transform: translateX(60px);
    transition: all 0.5s ease-in;
}

.workout .intro .image img { width: 300px; }

/* workout types tabs */
.workout .container .workout-content .workout-types {
    display: flex;
    justify-content: center;
    gap: 0;
    background-color: var(--gray);
    width: fit-content;
    margin: 40px auto 30px;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.workout .container .workout-content .workout-types .btn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    padding: 14px 24px;
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    transition: 0.3s;
    z-index: 1;
    font-weight: bold;
    white-space: nowrap;
}

.workout .container .workout-content .workout-types .active-bg {
    position: absolute;
    height: 100%;
    background-color: var(--yellow);
    border-radius: 10px;
    transition: left 0.4s ease, width 0.4s ease;
}

/* info */
.info { text-align: center; margin-bottom: 30px; }
.info .info-text {
    width: min(80%, 700px);
    margin: 10px auto 0;
    font-size: 18px;
    line-height: 1.8;
    color: var(--muted);
}

/* cards */
.workout-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.workout-cards .card {
    border-radius: 16px;
    box-shadow: 0 6px 16px rgba(0,0,0,0.12);
    overflow: hidden;
    background: var(--white);
}

.workout-cards .card .image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.workout-cards .card .body { padding: 16px; }
.workout-cards .card .body h3 {
    font-size: 18px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--gray);
    margin-bottom: 12px;
}

.workout-cards .card .body p {
    direction: rtl;
    font-size: 16px;
    line-height: 1.7;
    color: var(--muted);
    min-height: 100px;
}

.workout-cards .card .footer {
    padding: 14px 16px;
    border-top: 2px solid var(--gray);
    font-size: 16px;
}

.workout-cards .card .footer .time { margin-left: 8px; font-weight: bold; }

@media (max-width: 768px) {
    .workout .container .intro .image { display: none; }
    .workout .intro .text { text-align: center; }
    .workout .container .workout-content .workout-types .btn { font-size: 14px; padding: 12px 14px; }
}

/* ================================
   BMI SECTION
   ================================ */
.bmi-section {
    background-color: var(--bg);
    padding: 60px 0 80px;
}

.bmi-section .container { margin-top: 60px; }

.bmi-calculator-container {
    background-color: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    max-width: 680px;
    margin: 0 auto;
    direction: rtl;
}

/* inputs */
.bmi-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.bmi-inputs .input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bmi-inputs .input-group label {
    font-size: 14px;
    font-weight: 700;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.bmi-inputs .input-group label i { color: var(--black); font-size: 14px; }

.bmi-inputs .input-group input[type="number"] {
    padding: 12px 14px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    background-color: #fafafa;
    color: #333;
    outline: none;
    transition: border-color 0.3s;
    -moz-appearance: textfield;
    width: 100%;
}

.bmi-inputs .input-group input[type="number"]::-webkit-inner-spin-button,
.bmi-inputs .input-group input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }

.bmi-inputs .input-group input[type="number"]:focus {
    border-color: var(--black);
    background-color: var(--white);
}

/* radio */
.radio-group-container {
    display: flex;
    gap: 10px;
    background: none;
    border: none;
    padding: 0;
    margin: 0;
}

.radio-label {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    background-color: #fafafa;
    transition: all 0.2s;
}

.radio-label:hover { border-color: var(--black); }

.radio-label input[type="radio"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border: 2px solid #999;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.radio-label input[type="radio"]:checked {
    background-color: var(--black);
    border-color: var(--black);
    box-shadow: inset 0 0 0 3px #fff;
}

.radio-label:has(input:checked) {
    border-color: var(--black);
    background-color: var(--yellow);
}

/* calculate button */
.bmi-calculator-container .calculate-btn {
    width: 100%;
    padding: 16px;
    background-color: var(--black);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.bmi-calculator-container .calculate-btn:hover  { background-color: #2c2c2c; }
.bmi-calculator-container .calculate-btn:active { transform: scale(0.99); }

/* result */
.result-box {
    text-align: center;
    padding: 28px 20px;
    border: 2px dashed #ddd;
    border-radius: 12px;
    background-color: #fafafa;
}

.result-title {
    font-size: 13px;
    font-weight: 700;
    color: #888;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.result-value {
    font-size: 72px;
    font-weight: 900;
    color: var(--black);
    line-height: 1;
    margin-bottom: 14px;
    transition: color 0.4s;
}

.enter-data-btn {
    display: inline-block;
    padding: 8px 22px;
    border-radius: 20px;
    border: none;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    cursor: default;
    transition: all 0.3s;
    background-color: #e9ecef;
    color: #555;
}

@media (max-width: 600px) {
    .bmi-calculator-container { padding: 24px 16px; }
    .bmi-inputs { grid-template-columns: 1fr; }
    .result-value { font-size: 52px; }
}