/* ============================================
   AboutPage.css - دکمه ثابت درباره صفحه با کادر متنی
   ============================================ */

/* ===== دکمه ثابت - خوابیده در سمت چپ و وسط صفحه ===== */
.about-page-btn {
    position: fixed;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    z-index: 1000;
    padding: 1rem 0.7rem;
    font-family: 'Vazirmatn', Tahoma, Arial, sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-light, #ffffff);
    background: linear-gradient(135deg, var(--elam-gold, #d4a847), #b8892e);
    border: var(--border-md, 2px) solid rgba(255, 255, 255, 0.25);
    border-left: none;
    border-radius: 0 var(--radius-xl, 20px) var(--radius-xl, 20px) 0;
    cursor: pointer;
    box-shadow: var(--shadow-md, 0 4px 15px rgba(0, 0, 0, 0.2));
    transition: all var(--transition-bounce, 0.3s cubic-bezier(0.4, 0, 0.2, 1));
    white-space: nowrap;
    letter-spacing: 0.5px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    line-height: 1;
}

.about-page-btn:hover {
    transform: translateY(-50%) translateX(4px);
    padding-right: 1rem;
    box-shadow: 0 8px 30px rgba(212, 168, 71, 0.45);
    background: linear-gradient(135deg, #e0b855, #d4a847);
}

.about-page-btn:active {
    transform: translateY(-50%) translateX(2px) scale(0.97);
}

.about-page-btn:focus-visible {
    outline: var(--border-thick, 3px) solid var(--primary-blue, #4A90E2);
    outline-offset: var(--border-md, 2px);
}

/* ===== کادر متنی - باز شدن از سمت چپ ===== */
.about-page-box {
    position: fixed;
    top: 50%;
    left: 4rem;
    transform: translateY(-50%) translateX(-20px) scale(0.95);
    z-index: 1001;
    width: 90%;
    max-width: 420px;
    max-height: 70vh;
    overflow-y: auto;
    background: rgba(26, 42, 58, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--text-light, #ffffff);
    border: var(--border-md, 2px) solid var(--elam-gold, #d4a847);
    border-radius: var(--radius-lg, 16px);
    box-shadow: 0 12px 50px rgba(0, 0, 0, 0.45);
    padding: 1.5rem 1.5rem 1.2rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-bounce, 0.35s cubic-bezier(0.4, 0, 0.2, 1));
    font-family: 'Vazirmatn', Tahoma, Arial, sans-serif;
}

.about-page-box.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0) scale(1);
}

/* ===== هدر کادر ===== */
.about-page-box .about-box-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: var(--border-thin, 1px) solid rgba(212, 168, 71, 0.35);
}

.about-page-box .about-box-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--elam-gold, #d4a847);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.about-page-box .about-box-close {
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: var(--text-light, #ffffff);
    font-size: 1.4rem;
    width: 2.2rem;
    height: 2.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast, 0.2s ease);
    flex-shrink: 0;
    line-height: 1;
}

.about-page-box .about-box-close:hover {
    background: rgba(228, 64, 95, 0.3);
    transform: rotate(90deg);
}

/* ===== متن کادر ===== */
.about-page-box .about-box-body {
    font-size: 0.95rem;
    line-height: 1.9;
    color: #e8edf3;
    text-align: right;
}

.about-page-box .about-box-body p {
    margin: 0 0 0.75rem;
}

.about-page-box .about-box-body p:last-child {
    margin-bottom: 0;
}

.about-page-box .about-box-body strong {
    color: var(--elam-gold, #d4a847);
}

/* ===== اسکرول‌بار کادر ===== */
.about-page-box::-webkit-scrollbar {
    width: 6px;
}

.about-page-box::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.about-page-box::-webkit-scrollbar-thumb {
    background: var(--elam-gold, #d4a847);
    border-radius: 3px;
}

/* ============================================
   واکنش‌گرایی
   ============================================ */

@media(max-width: 767px) {
    .about-page-btn {
        padding: 0.8rem 0.55rem;
        font-size: 0.8rem;
        border-radius: 0 var(--radius-lg, 16px) var(--radius-lg, 16px) 0;
    }

    .about-page-box {
        left: 3.2rem;
        width: calc(100% - 3.8rem);
        max-width: none;
        max-height: 65vh;
        padding: 1.2rem 1.1rem 1rem;
    }

    .about-page-box .about-box-title {
        font-size: 1rem;
    }

    .about-page-box .about-box-body {
        font-size: 0.85rem;
        line-height: 1.8;
    }
}

@media(min-width: 768px) and (max-width: 1023px) {
    .about-page-btn {
        padding: 0.9rem 0.6rem;
        font-size: 0.88rem;
    }

    .about-page-box {
        left: 3.8rem;
        width: 380px;
        max-height: 68vh;
    }
}

@media(min-width: 1024px) {
    .about-page-box {
        left: 4.2rem;
        max-width: 460px;
    }
}

/* ===== کاهش انیمیشن ===== */
@media (prefers-reduced-motion: reduce) {
    .about-page-btn,
    .about-page-box {
        transition: none;
    }
}