/* ==========================================================================
   Layout, Navigation, Buttons
   ========================================================================== */

.app-container {
    display: flex;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.navigation {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.25rem 0.875rem 1rem;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.625rem;
    margin-bottom: 1.75rem;
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    color: var(--text-primary);
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-fast);
}

.nav-brand:hover { background-color: var(--bg-tertiary); }

/* Marka işareti: degrade kare rozet */
.nav-brand i {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    flex-shrink: 0;
    font-size: 1.1rem;
    color: var(--brand-contrast);
    background: var(--brand-gradient);
    border-radius: 10px;
    box-shadow: 0 3px 10px var(--brand-glow);
}

.nav-section-label {
    padding: 0 0.75rem 0.5rem;
    font-size: 0.6875rem;
    font-weight: 650;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.6875rem 0.75rem;
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    font-size: var(--text-base);
    font-weight: 550;
    cursor: pointer;
    position: relative;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.nav-item i {
    font-size: 1.3rem;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.nav-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item:active i { transform: scale(0.92); }

.nav-item.active {
    background: var(--brand-gradient);
    color: var(--brand-contrast);
    font-weight: 600;
    box-shadow: 0 4px 14px -2px var(--brand-glow);
}

.nav-item.active:hover { color: var(--brand-contrast); }

.badge {
    position: absolute;
    right: 0.875rem;
    min-width: 20px;
    text-align: center;
    background-color: var(--danger);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.0625rem 0.375rem;
    border-radius: var(--border-radius-full);
    line-height: 1.4;
}

.nav-footer {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.75rem;
    padding: 0.75rem 0.25rem 0;
    border-top: 1px solid var(--border-color);
}

/* --------------------------------------------------------------------------
   Icon buttons
   -------------------------------------------------------------------------- */
.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.icon-btn i { font-size: 1.2rem; }

.icon-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.icon-btn:active { transform: scale(0.94); }

#lang-toggle {
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.375rem 0.5rem;
    border-radius: var(--border-radius-sm);
}

.user-profile img,
.avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--border-radius-full);
    object-fit: cover;
    border: 2px solid var(--bg-secondary);
    box-shadow: 0 0 0 1px var(--border-color);
    transition: box-shadow var(--transition-fast);
}

.user-profile img:hover {
    box-shadow: 0 0 0 2px var(--brand-primary);
}

/* --------------------------------------------------------------------------
   Main content
   -------------------------------------------------------------------------- */
.main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.views-container {
    flex: 1;
    position: relative;
    min-height: 0;
}

.view-section {
    position: absolute;
    inset: 0;
    padding: 0 2rem 3rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(4px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.view-section.active {
    opacity: 1;
    transform: none;
    pointer-events: all;
}

/* Sayfa başlığı bloğu — tüm görünümlerde ortak çerçeve */
.view-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    width: 100%;
    max-width: var(--content-width);
    margin: 1.75rem auto 1.25rem;
}

.view-header-text { min-width: 0; }

.view-title {
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
}

.view-subtitle {
    margin-top: 0.125rem;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.view-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.view-header--narrow { max-width: var(--content-width-narrow); }

/* Sayfa içi ayırıcı */
.section-divider {
    height: 1px;
    background: var(--border-color);
    border: 0;
    margin: 1.5rem auto;
    max-width: var(--content-width);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.primary-btn,
.secondary-btn,
.danger-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5625rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: -0.005em;
    border: 1px solid transparent;
    white-space: nowrap;
    transition: background-color var(--transition-fast), border-color var(--transition-fast),
                box-shadow var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.primary-btn {
    background: var(--brand-gradient);
    color: var(--brand-contrast);
    box-shadow: 0 1px 2px hsl(220 40% 12% / 0.12), 0 4px 12px -3px var(--brand-glow);
}

.primary-btn:hover {
    box-shadow: 0 2px 4px hsl(220 40% 12% / 0.14), 0 8px 20px -4px var(--brand-glow);
    transform: translateY(-1px);
}

.primary-btn:active { transform: translateY(0) scale(0.99); }

.secondary-btn {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
    box-shadow: var(--shadow-xs);
}

.secondary-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color-hover);
}

.secondary-btn:active { transform: scale(0.985); }

.danger-btn {
    background-color: var(--danger-soft);
    color: var(--danger);
}

.danger-btn:hover { background-color: var(--danger-soft); filter: brightness(0.97); }

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--text-xs);
    border-radius: var(--border-radius-sm);
}

.primary-btn:disabled,
.secondary-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Kayan eylem düğmesi (FAB) */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 90;
    padding: 0.875rem 1.375rem;
    font-size: var(--text-base);
    border-radius: var(--border-radius-full);
    box-shadow: 0 4px 10px hsl(220 40% 12% / 0.14), 0 14px 32px -8px var(--brand-glow);
}

.fab i { font-size: 1.15rem; }

/* --------------------------------------------------------------------------
   Boş durum
   -------------------------------------------------------------------------- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.375rem;
    padding: 3.5rem 1.5rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 1.75rem;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    border-radius: var(--border-radius-full);
    margin-bottom: 0.5rem;
}

.empty-state strong {
    font-size: var(--text-md);
    font-weight: 650;
    color: var(--text-primary);
}

.empty-state span { font-size: var(--text-sm); max-width: 34ch; }

/* --------------------------------------------------------------------------
   Responsive — tablet
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
    :root { --sidebar-width: 76px; }

    .navigation { padding: 1.25rem 0.625rem 1rem; align-items: center; }
    .nav-brand { margin-bottom: 1.25rem; padding: 0.25rem; }
    .nav-brand .brand-name { display: none; }
    .nav-section-label { display: none; }
    .nav-links { width: 100%; }
    .nav-item {
        justify-content: center;
        padding: 0.75rem 0;
    }
    .nav-item span:not(.badge) { display: none; }
    .badge { right: 0.75rem; top: 0.375rem; }
    .nav-footer {
        flex-direction: column;
        gap: 0.375rem;
        padding-top: 0.75rem;
        width: 100%;
    }
    #lang-toggle { margin-right: 0 !important; }
    .notifications-wrapper { margin-right: 0 !important; }
    .view-section { padding: 0 1.5rem 3rem; }
}

/* --------------------------------------------------------------------------
   Responsive — mobil: üstte başlık çubuğu, altta sekme çubuğu
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    :root { --sidebar-width: 100%; }

    .app-container { flex-direction: column; }

    /* Sidebar'ı çöz: parçalar bağımsız sabitlenir */
    .navigation { display: contents; }

    .nav-brand {
        position: fixed;
        top: 0; left: 0; right: 0;
        height: 56px;
        display: flex;
        align-items: center;
        margin: 0;
        padding: 0 1rem;
        z-index: 60;
        background: var(--glass-bg);
        backdrop-filter: blur(14px) saturate(1.6);
        -webkit-backdrop-filter: blur(14px) saturate(1.6);
        border-bottom: 1px solid var(--border-color);
        border-radius: 0;
        font-size: var(--text-md);
        padding-right: 10.5rem;
    }

    .nav-brand .brand-name { display: inline; }
    .nav-brand i { width: 28px; height: 28px; font-size: 0.95rem; border-radius: 8px; }

    .nav-footer {
        position: fixed;
        top: 0; right: 0;
        width: auto;
        height: 56px;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 0.125rem;
        margin: 0;
        padding: 0 0.75rem;
        border: none;
        background: transparent;
        z-index: 61;
    }

    #lang-toggle { margin-right: 0 !important; }
    .notifications-wrapper { margin-right: 0 !important; }

    .nav-links {
        position: fixed;
        bottom: 0; left: 0; right: 0;
        flex-direction: row;
        justify-content: space-around;
        gap: 0;
        padding: 0.375rem 0.375rem calc(0.375rem + env(safe-area-inset-bottom));
        background: var(--glass-bg);
        backdrop-filter: blur(14px) saturate(1.6);
        -webkit-backdrop-filter: blur(14px) saturate(1.6);
        border-top: 1px solid var(--border-color);
        z-index: 60;
    }

    .nav-item {
        flex: 1;
        flex-direction: column;
        gap: 0.1875rem;
        padding: 0.4375rem 0.25rem;
        font-size: 0.625rem;
        font-weight: 600;
        border-radius: var(--border-radius-sm);
    }

    .nav-item span:not(.badge) { display: block; }
    .nav-item i { font-size: 1.35rem; }

    .nav-item.active {
        background: transparent;
        color: var(--brand-primary);
        box-shadow: none;
    }

    .nav-item.active i { transform: translateY(-1px); }

    .badge {
        top: 0.25rem;
        right: 50%;
        margin-right: -1.15rem;
        min-width: 8px;
        width: 8px;
        height: 8px;
        padding: 0;
        font-size: 0;
        line-height: 0;
    }

    .main-content { padding-top: 56px; padding-bottom: 66px; }

    .view-section { padding: 0 1rem 2rem; }

    .view-header { margin: 1rem auto; }
    .view-title { font-size: var(--text-lg); }

    .fab { bottom: 84px; right: 1rem; padding: 0.75rem 1.125rem; }
}

/* --- Aşağı çekerek yenileme göstergesi ---------------------------------- */
.ptr-indicator {
    position: fixed;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 200;
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: var(--border-radius-full);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    color: var(--text-tertiary);
    opacity: 0;
    pointer-events: none;
}

.ptr-indicator i { font-size: 1.15rem; }

/* Sürüklendikçe görünür olsun */
.ptr-indicator[style*="translateY"] { opacity: 1; }

.ptr-indicator.is-ready { color: var(--brand-primary); border-color: var(--brand-primary); }

.ptr-indicator.is-busy i {
    animation: ptrSpin 700ms linear infinite;
    color: var(--brand-primary);
}

@keyframes ptrSpin { to { transform: rotate(360deg); } }