/* ============================================
   Premium Header Styles - Linear/Notion Style
   ============================================ */

:root {
    --header-bg: rgba(248, 250, 252, 0.8);
    --header-border: #E2E8F0;
    --header-text: #0F172A;
    --header-muted: #64748B;
    --header-card: #FFFFFF;
    --header-primary: #2563EB;
    --header-primary-hover: #1D4ED8;
    --header-danger: #EF4444;
    --header-success: #22C55E;
    --header-warning: #F59E0B;
    --header-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --header-radius: 12px;
    --header-radius-lg: 14px;
    --header-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --header-bg: rgba(11, 18, 32, 0.8);
    --header-border: #23304A;
    --header-text: #E5E7EB;
    --header-muted: #94A3B8;
    --header-card: #111A2E;
    --header-primary: #3B82F6;
    --header-primary-hover: #2563EB;
}

/* Header Container */
.app-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--header-border);
    box-shadow: var(--header-shadow);
    transition: var(--header-transition);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0.875rem 1.5rem;
    gap: 1.25rem;
    min-height: 64px;
    width: 100%;
    box-sizing: border-box;
}

/* Responsive padding */
@media (max-width: 768px) {
    .header-container {
        padding: 0.75rem 1rem;
        gap: 0.75rem;
        min-height: 56px;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 0.625rem 0.75rem;
        gap: 0.5rem;
        min-height: 56px;
    }
}

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--header-text);
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
    transition: var(--header-transition);
    padding: 0.5rem 0.75rem;
    border-radius: 12px;
    margin: -0.5rem;
}

.header-logo:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--header-primary);
    transform: translateY(-1px);
}

.header-logo-icon {
    font-size: 1.75rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.header-logo-text {
    font-weight: 700;
    letter-spacing: -0.02em;
    white-space: nowrap;
    color: var(--header-primary);
}

.header-logo:hover .header-logo-text {
    color: var(--header-primary-hover);
}

[data-theme="dark"] .header-logo-text {
    color: var(--header-primary);
}

[data-theme="dark"] .header-logo:hover .header-logo-text {
    color: var(--header-primary-hover);
}

/* Logo text responsive kısaltma */
@media (max-width: 360px) {
    .header-logo-text {
        display: none;
    }
    
    .header-logo {
        gap: 0;
    }
}

@media (min-width: 360px) and (max-width: 420px) {
    .header-logo-text {
        font-size: 0.875rem;
    }
    
    .header-logo {
        gap: 0.375rem;
    }
}

/* Desktop Navigation Pills */
.header-nav {
    display: none;
    flex: 1;
    justify-content: center;
    min-width: 0;
    overflow: hidden;
}

@media (min-width: 768px) {
    .header-nav {
        display: flex;
    }
}

/* Tablet'te nav pills için ekstra kontrol */
@media (min-width: 768px) and (max-width: 1024px) {
    .header-nav {
        flex: 0 1 auto;
        max-width: calc(100vw - 300px);
    }
    
    .nav-pills {
        max-width: 100%;
    }
}

.nav-pills {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--header-card);
    padding: 0.5rem;
    border-radius: var(--header-radius);
    border: 1px solid var(--header-border);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-pills::-webkit-scrollbar {
    display: none;
}

/* Tablet'te nav pills horizontal scroll */
@media (min-width: 768px) and (max-width: 1024px) {
    .nav-pills {
        max-width: 100%;
        overflow-x: auto;
    }
}

.nav-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 1.125rem;
    text-decoration: none;
    color: var(--header-muted);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 10px;
    transition: var(--header-transition);
    white-space: nowrap;
    min-height: 40px;
    min-width: 40px;
    position: relative;
    flex-shrink: 0;
}

.nav-pill:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--header-text);
}

.nav-pill--active {
    background: var(--header-primary);
    color: #FFFFFF;
    font-weight: 600;
}

.nav-pill--active:hover {
    background: var(--header-primary-hover);
    color: #FFFFFF;
}

.nav-pill-icon {
    font-size: 1rem;
    line-height: 1;
    flex-shrink: 0;
}

.nav-pill-label {
    line-height: 1.4;
}

/* Progressive Hiding */
@media (max-width: 1024px) {
    .nav-pill--hide-lg {
        display: none;
    }
}

@media (max-width: 900px) {
    .nav-pill--hide-md {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-pill--hide-sm {
        display: none;
    }
}

/* Desktop Actions */
.header-actions {
    display: none;
    align-items: center;
    gap: 0.375rem;
    flex-shrink: 0;
    flex-wrap: nowrap;
    background: var(--header-card);
    padding: 0.375rem;
    border-radius: var(--header-radius);
    border: 1px solid var(--header-border);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
}

@media (min-width: 768px) {
    .header-actions {
        display: flex;
    }
}

.header-action {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    text-decoration: none;
    color: var(--header-text);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--header-transition);
    white-space: nowrap;
    min-height: 40px;
    background: transparent;
    border: none;
    font-family: inherit;
    cursor: pointer;
}

.header-action:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--header-primary);
}

.header-action--active {
    background: rgba(37, 99, 235, 0.1);
    color: var(--header-primary);
}

.header-action--istiklal {
    color: #DC2626;
    font-weight: 600;
}

.header-action--istiklal:hover {
    background: rgba(220, 38, 38, 0.1);
    color: #DC2626;
}

.header-action--icon {
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}

.header-action--logout {
    color: var(--header-danger);
}

.header-action--logout:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--header-danger);
}

.header-action-icon {
    font-size: 1.125rem;
    line-height: 1;
}

.header-action-label {
    line-height: 1.4;
}

.header-action--desktop {
    display: inline-flex;
}

/* Theme Toggle */
#theme-toggle {
    position: relative;
    overflow: hidden;
}

.theme-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1.125rem;
}

.theme-icon--light {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg) scale(0.8);
}

.theme-icon--dark {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

[data-theme="dark"] .theme-icon--light {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

[data-theme="dark"] .theme-icon--dark {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg) scale(0.8);
}

#theme-toggle:active {
    transform: scale(0.95);
}

/* Mobile Menu Toggle */
.header-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: var(--header-text);
    transition: var(--header-transition);
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .header-menu-toggle {
        display: none;
    }
}

.header-menu-toggle:hover {
    background: rgba(37, 99, 235, 0.1);
}

.header-menu-toggle[aria-expanded="true"] .menu-toggle-icon {
    transform: rotate(90deg);
}

.menu-toggle-icon {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 20px;
    height: 16px;
    transition: transform 0.3s ease;
}

.menu-toggle-line {
    width: 100%;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: var(--header-transition);
}

.header-menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.header-menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(2) {
    opacity: 0;
}

.header-menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Drawer */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 10001;
    pointer-events: none;
    visibility: hidden;
}

.mobile-drawer.is-open {
    pointer-events: auto;
    visibility: visible;
}

.drawer-overlay {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.mobile-drawer.is-open .drawer-overlay {
    opacity: 1;
}

.drawer-content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(92vw, 360px);
    background: var(--header-card);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100vh;
    max-height: 100vh;
    z-index: 2;
}

.mobile-drawer.is-open .drawer-content {
    transform: translateX(0);
}

.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--header-border);
    flex-shrink: 0;
}

.drawer-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--header-text);
    margin: 0;
}

.drawer-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: var(--header-muted);
    font-size: 1.5rem;
    line-height: 1;
    transition: var(--header-transition);
    flex-shrink: 0;
}

.drawer-close:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--header-text);
}

/* Drawer User Card */
.drawer-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--header-border);
}

.drawer-user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--header-primary);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.drawer-user-info {
    flex: 1;
    min-width: 0;
}

.drawer-user-name {
    font-weight: 600;
    color: var(--header-text);
    font-size: 0.9375rem;
    margin-bottom: 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.drawer-user-email {
    font-size: 0.8125rem;
    color: var(--header-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Drawer Body (scrollable) */
.drawer-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    min-height: 0;
    display: block;
    position: relative;
}

/* Drawer Navigation */
.drawer-nav {
    padding: 0.75rem 0;
}

.drawer-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    color: var(--header-text);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--header-transition);
    position: relative;
    min-height: 44px;
}

.drawer-nav-item:hover {
    background: rgba(37, 99, 235, 0.08);
}

.drawer-nav-item--active {
    background: rgba(37, 99, 235, 0.1);
    color: var(--header-primary);
    font-weight: 600;
}

.drawer-nav-icon {
    font-size: 1.25rem;
    line-height: 1;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.drawer-nav-label {
    flex: 1;
}

.drawer-nav-indicator {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--header-primary);
    border-radius: 0 2px 2px 0;
}

/* Drawer Divider */
.drawer-divider {
    height: 1px;
    background: var(--header-border);
    margin: 0.5rem 1.5rem;
}

/* Drawer Actions */
.drawer-actions {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--header-border);
}

.drawer-action-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    color: var(--header-text);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--header-transition);
    min-height: 44px;
}

.drawer-action-item:hover {
    background: rgba(37, 99, 235, 0.08);
}

.drawer-action-item--istiklal {
    color: #DC2626;
    font-weight: 600;
}

.drawer-action-item--istiklal:hover {
    background: rgba(220, 38, 38, 0.1);
}

.drawer-action-icon {
    font-size: 1.125rem;
    line-height: 1;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.drawer-action-label {
    flex: 1;
}

.drawer-action-item--button {
    background: transparent;
    border: none;
    font-family: inherit;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.drawer-action-item--button .drawer-action-icon {
    position: relative;
    width: 24px;
    height: 24px;
}

.drawer-action-item--button .theme-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1.125rem;
}

.drawer-action-item--button .theme-icon--light {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg) scale(0.8);
}

.drawer-action-item--button .theme-icon--dark {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

[data-theme="dark"] .drawer-action-item--button .theme-icon--light {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

[data-theme="dark"] .drawer-action-item--button .theme-icon--dark {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg) scale(0.8);
}

/* Drawer Logout */
.drawer-logout-form {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--header-border);
    flex-shrink: 0;
}

.drawer-logout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    background: transparent;
    border: 1.5px solid var(--header-danger);
    border-radius: 10px;
    color: var(--header-danger);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--header-transition);
    min-height: 44px;
}

.drawer-logout-btn:hover {
    background: var(--header-danger);
    color: #FFFFFF;
}

.drawer-logout-icon {
    font-size: 1.125rem;
    line-height: 1;
}

.drawer-logout-label {
    line-height: 1.4;
}

/* Flash Messages */
.flash-message {
    position: relative;
    margin: 1rem auto;
    max-width: 1200px;
    padding: 1rem 1.25rem;
    border-radius: var(--header-radius-lg);
    box-shadow: var(--header-shadow);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    animation: slideDown 0.3s ease-out;
    z-index: 100;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.flash-message--error {
    background: #FEF2F2;
    border: 1px solid #FECACA;
    color: #991B1B;
}

.flash-message--success {
    background: #F0FDF4;
    border: 1px solid #BBF7D0;
    color: #166534;
}

[data-theme="dark"] .flash-message--error {
    background: rgba(127, 29, 29, 0.2);
    border-color: rgba(239, 68, 68, 0.3);
    color: #FCA5A5;
}

[data-theme="dark"] .flash-message--success {
    background: rgba(20, 83, 45, 0.2);
    border-color: rgba(34, 197, 94, 0.3);
    color: #86EFAC;
}

.flash-message-content {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.flash-message-icon {
    font-size: 1.25rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.flash-message-text {
    flex: 1;
    min-width: 0;
}

.flash-message-title {
    display: block;
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: 0.25rem;
}

.flash-message-desc {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
    opacity: 0.9;
}

.flash-message-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: currentColor;
    font-size: 1.25rem;
    line-height: 1;
    opacity: 0.7;
    transition: var(--header-transition);
    flex-shrink: 0;
}

.flash-message-close:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .flash-message-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
.header-action:focus-visible,
.nav-pill:focus-visible,
.header-menu-toggle:focus-visible,
.drawer-close:focus-visible,
.drawer-nav-item:focus-visible,
.drawer-action-item:focus-visible,
.drawer-logout-btn:focus-visible {
    outline: 2px solid var(--header-primary);
    outline-offset: 2px;
}

/* Prevent horizontal scroll */
html, body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

.app-header,
.header-container {
    max-width: 100%;
    box-sizing: border-box;
}

/* Extra Small Devices (360px) */
@media (max-width: 480px) {
    .header-logo {
        padding: 0.375rem;
        gap: 0.25rem;
    }
    
    .header-logo-icon {
        font-size: 1.25rem;
    }
    
    .drawer-content {
        width: min(92vw, 320px);
    }
}