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

body {
    font-family: "Vazirmatn", sans-serif;
    background: #f7fafc;
    color: #17345f;
}

.ai-section {
    max-width: 1400px;
    margin: 40px auto;
    padding: 30px;
    border: 1px solid #d8e6f0;
    border-radius: 28px;
    background: radial-gradient(circle at 50% 0%, rgba(50, 174, 190, 0.10), transparent 40%), #ffffff;
    box-shadow: 0 10px 40px rgba(20, 55, 90, 0.06);
}

.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1.6fr 1fr;
    gap: 28px;
    align-items: stretch;
}

.ai-card {
    position: relative;
    overflow: hidden;
    padding: 32px 28px;
    border: 1px solid #b9dbe5;
    border-radius: 24px;
    background: linear-gradient(145deg, #ffffff, #edf8fa);
    min-height: 440px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: 0.3s ease;
}

    .ai-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 18px 40px rgba(25, 83, 110, 0.12);
    }

.ai-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.1);
    border: 3px solid #ef4444;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4), inset 0 0 15px rgba(239, 68, 68, 0.2);
    transition: transform 0.5s ease, box-shadow 0.3s ease;
}

.ai-card:hover .ai-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 30px rgba(239, 68, 68, 0.6), inset 0 0 20px rgba(239, 68, 68, 0.3);
}

.ai-icon svg {
    filter: drop-shadow(0 0 5px rgba(239, 68, 68, 0.5));
}

.card-subtitle {
    color: #d1d5db;
    font-size: 1rem;
    font-weight: bold;
    line-height: 1.8;
    margin-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    padding: 7px 22px;
    border-radius: 10px;
    background: linear-gradient(90deg, #087f83, #159ca1);
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
}

.advanced-card .badge {
    background: linear-gradient(90deg, #173f85, #2963c4);
}

.card-title {
    margin-top: 20px;
    font-size: 26px;
    font-weight: 800;
    color: #124f64;
}

.advanced-card .card-title {
    color: #174a96;
}

.card-subtitle {
    margin-top: 8px;
    font-size: 15px;
    color: #526b86;
}

/* آیکون‌های اصلی */
.ai-icon {
    width: 125px;
    height: 125px;
    margin: 25px auto;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 42px;
    font-weight: 800;
    color: #ffffff;
    background: linear-gradient(145deg, #1a9da1, #08757a);
    box-shadow: 0 10px 25px rgba(0, 135, 140, 0.25);
}

.advanced-card .ai-icon {
    background: linear-gradient(145deg, #285fbb, #123e88);
    box-shadow: 0 10px 25px rgba(25, 75, 160, 0.25);
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

    .feature-list li {
        display: flex;
        align-items: center;
        gap: 10px;
        color: #405875;
        font-size: 14px;
    }

        .feature-list li span {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: #e7f6f7;
            color: #07878c;
            font-size: 14px;
        }

.ai-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 20px;
    border-radius: 12px;
    text-decoration: none;
    color: #ffffff;
    font-weight: 700;
    font-size: 16px;
    background: linear-gradient(90deg, #07868b, #139da1);
    transition: 0.25s ease;
}

.advanced-card .ai-button {
    background: linear-gradient(90deg, #143c83, #2865c6);
}

.ai-button:hover {
    transform: translateY(-2px);
    filter: brightness(1.05);
}

.member-note {
    margin-top: 18px;
    text-align: center;
    font-size: 12px;
    color: #138083;
}

.models-section {
    text-align: center;
    padding: 10px 5px;
}

.section-title {
    font-size: 27px;
    font-weight: 800;
    color: #173b73;
}

/* استایل جدید ساب‌تایتل */
.section-subtitle {
    margin-top: 8px;
    margin-bottom: 28px;
    color: #59708b;
    font-size: 15px;
    line-height: 1.8;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.model-card {
    padding: 25px 15px;
    border-radius: 20px;
    background: #ffffff;
    border: 1px solid #dce8f0;
    box-shadow: 0 8px 22px rgba(30, 70, 100, 0.05);
    transition: 0.25s ease;
}

    .model-card:hover {
        transform: translateY(-4px);
        border-color: #6bbdc7;
        box-shadow: 0 12px 30px rgba(20, 100, 120, 0.12);
    }

.model-icon {
    margin: 0 auto 15px;
    display: flex;
    justify-content: center;
    align-items: center;
}

    .model-icon img {
        width: 60%;
        height: 100%;
        object-fit: cover;
    }

.model-card.luna .model-icon {
    border-color: #a855f7;
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.3);
}

.model-card.luna h3 {
    color: #a855f7;
}

.model-card.terra .model-icon {
    border-color: #00ffcc;
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.3);
}

.model-card.terra h3 {
    color: #00ffcc;
}

.model-card.sol .model-icon {
    border-color: #ffcc00;
    box-shadow: 0 0 15px rgba(255, 204, 0, 0.3);
}

.model-card.sol h3 {
    color: #ffcc00;
}

.model-card h3 {
    font-size: 15px;
    margin-bottom: 10px;
    color: #29466f;
}

.model-card p {
    font-size: 13px;
    line-height: 1.9;
    color: #657891;
}

/* استایل جدید باکس Pay As You Go */
.free-choice {
    margin-top: 22px;
    padding: 18px;
    border-radius: 17px;
    font-weight: 700;
    font-size: 17px;
    color: #24548b;
    transition: 0.3s ease;
}

    .free-choice:hover {
        transform: scale(1.02);
        box-shadow: 0 5px 15px rgba(7, 134, 139, 0.15);
    }

.discount-banner {
    margin-top: 32px;
    display: grid;
    grid-template-columns: 100px 1fr 100px;
    align-items: center;
    gap: 20px;
    padding: 25px 35px;
    border-radius: 22px;
    border: 1px solid #b8dde4;
    background: linear-gradient(90deg, #eefbfb, #f4f8ff);
}

.discount-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    background: #d9f4f5;
    font-size: 32px;
}

.discount-content {
    text-align: center;
}

    .discount-content h2 {
        font-size: 24px;
        color: #16777d;
    }

    .discount-content p {
        margin-top: 8px;
        color: #5b7089;
        font-size: 14px;
    }

.why-section {
    margin-top: 45px;
}

.why-title {
    text-align: center;
    font-size: 25px;
    margin-bottom: 30px;
    color: #173b73;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* کانتینر دکمه‌ها */
.button-group {
    display: flex;
    gap: 10px;
    width: 100%;
    margin-top: 10px;
}

    /* استایل مشترک دکمه‌ها */
    .button-group .ai-button {
        flex: 1;
        padding: 12px 10px;
        font-size: 14px;
    }

    /* استایل دکمه تیره/سرد (ورود) */
    .button-group .btn-secondary {
        background: linear-gradient(90deg, #143c83, #2865c6);
    }

    /* استایل دکمه روشن/نارنجی (شارژ) */
    .button-group .btn-primary {
        background: linear-gradient(90deg, #ff6b00, #f97316);
        box-shadow: 0 4px 15px rgba(255, 107, 0, 0.3);
    }

/* برای اینکه ۵ آیتم در ۴ ستون زیبا دیده شوند */
@media (min-width: 1051px) {
    .why-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

.why-item {
    text-align: center;
    padding: 10px 20px;
}

.why-icon {
    width: 65px;
    height: 65px;
    margin: 0 auto 15px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef5fb;
    font-size: 28px;
}

.why-item h3 {
    margin-bottom: 8px;
    font-size: 16px;
    color: #26466f;
}

.why-item p {
    font-size: 13px;
    line-height: 1.9;
    color: #657891;
}

/* استایل جدید آیتم اضافه شده */
.why-item .why-icon.custom-icon {
    background: #eafff9;
    color: #07868b;
}

@media (max-width: 1050px) {
    .ai-grid {
        grid-template-columns: 1fr 1fr;
    }

    .models-section {
        grid-column: 1 / -1;
        grid-row: 1;
    }

    .medical-card {
        grid-column: 1;
    }

    .advanced-card {
        grid-column: 2;
    }
}

@media (max-width: 768px) {
    .ai-section {
        margin: 15px;
        padding: 18px;
        border-radius: 20px;
    }

    .ai-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .advanced-card {
        grid-column: auto;
        order: 1;
    }

    .models-section {
        grid-column: auto;
        grid-row: auto;
        order: 2;
    }

    .medical-card {
        grid-column: auto;
        order: 3;
    }

    .ai-card {
        min-height: auto;
        padding: 25px 20px;
    }

    .card-title {
        font-size: 22px;
    }

    .ai-icon {
        width: 95px;
        height: 95px;
        font-size: 32px;
        margin: 20px auto;
    }

    .section-title {
        font-size: 21px;
    }

    .models-grid {
        gap: 8px;
    }

    .model-card {
        padding: 16px 8px;
        border-radius: 14px;
    }

    .model-icon {
        width: 52px;
        height: 52px;
        font-size: 18px;
    }

    .model-card h3 {
        font-size: 14px;
    }

    .free-choice {
        font-size: 15px;
    }

    .discount-banner {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 22px 15px;
    }

    .discount-icon {
        margin: auto;
    }

    .discount-content h2 {
        font-size: 18px;
    }

    .discount-content p {
        font-size: 13px;
        line-height: 2;
    }

    .why-grid {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }

    .why-item {
        padding: 10px;
    }

        .why-item p {
            font-size: 12px;
        }

    .model-icon img {
        width: 100%;
        height: auto;
    }
}

@media (max-width: 400px) {
    .models-grid {
        grid-template-columns: 1fr;
    }

    .model-card {
        display: flex;
        align-items: center;
        gap: 15px;
        text-align: right;
    }

    .model-icon {
        margin: 0;
        flex-shrink: 0;
    }

    .why-grid {
        grid-template-columns: 1fr;
    }
}