/**
 * IFINSTA Page Header Component - Unified Design System
 * Enhanced design system for page headers with modern aesthetics
 */

/* Base Page Header */
.ifinsta-page-header {
    --header-padding: var(--ifinsta-space-1);
    --header-gap: var(--ifinsta-space-2);
    --title-size: clamp(1.15rem, 1rem + 0.5vw, 1.5rem);
    --subtitle-size: var(--ifinsta-body-sm);

    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: var(--ifinsta-space-1-5);
    margin-bottom: var(--ifinsta-space-2);
    padding: var(--header-padding) 0;
    background: transparent;
    border-bottom: 1px solid var(--ifinsta-border);
}

/* Compact Variant */
.ifinsta-page-header--compact {
    --header-padding: var(--ifinsta-space-2);
    --title-size: var(--ifinsta-h3);
    --subtitle-size: var(--ifinsta-caption);
    margin-bottom: var(--ifinsta-space-2);
}

/* Inner Container */
.ifinsta-page-header__inner,
.ifinsta-page-header > *:first-child {
    position: relative;
    z-index: 1;
}

/* Back Link */
.ifinsta-page-header__back,
.ifinsta-page-header > a:first-child {
    margin-bottom: var(--ifinsta-space-2);
}

.ifinsta-page-header__back-link,
.ifinsta-page-header > a:first-child.ifinsta-btn--ghost {
    display: inline-flex;
    align-items: center;
    gap: var(--ifinsta-space-1-5);
    padding: var(--ifinsta-space-0-5) var(--ifinsta-space-1-5);
    margin-left: calc(var(--ifinsta-space-2) * -1);
    color: var(--ifinsta-text-secondary);
    font-size: var(--ifinsta-text-xs);
    font-weight: var(--ifinsta-font-medium);
    text-decoration: none;
    border-radius: var(--ifinsta-radius-md);
    transition: all var(--ifinsta-duration-fast) var(--ifinsta-ease-fluent);
    background: transparent;
    border: none;
    cursor: pointer;
}

.ifinsta-page-header__back-link:hover,
.ifinsta-page-header > a:first-child.ifinsta-btn--ghost:hover {
    color: var(--ifinsta-primary);
    background: var(--ifinsta-primary-alpha-08);
}

.ifinsta-page-header__back-link:hover svg,
.ifinsta-page-header > a:first-child.ifinsta-btn--ghost:hover svg {
    transform: translateX(-3px);
}

.ifinsta-page-header__back-link svg,
.ifinsta-page-header > a:first-child.ifinsta-btn--ghost svg {
    width: 14px;
    height: 14px;
    transition: transform var(--ifinsta-duration-fast) var(--ifinsta-ease-fluent);
}

/* Breadcrumb */
.ifinsta-page-header__breadcrumb,
.ifinsta-page-header > nav.ifinsta-breadcrumb {
    flex: 0 0 100%;
    margin-bottom: var(--ifinsta-space-1-5);
    font-size: var(--ifinsta-text-xs);
    color: var(--ifinsta-text-muted);
}

.ifinsta-page-header__breadcrumb:empty,
.ifinsta-page-header > nav.ifinsta-breadcrumb:empty {
    display: none;
    margin-bottom: 0;
}

.ifinsta-page-header__breadcrumb a,
.ifinsta-page-header > nav.ifinsta-breadcrumb a {
    color: var(--ifinsta-text-secondary);
    text-decoration: none;
    padding: var(--ifinsta-space-0-5) var(--ifinsta-space-1-5);
    margin: 0 calc(var(--ifinsta-space-1) * -1);
    border-radius: var(--ifinsta-radius-md);
    transition: all var(--ifinsta-transition-fast);
}

.ifinsta-page-header__breadcrumb a:hover,
.ifinsta-page-header > nav.ifinsta-breadcrumb a:hover {
    color: var(--ifinsta-primary);
    background: var(--ifinsta-primary-alpha-08);
}

/* Main Content Area */
.ifinsta-page-header__main,
.ifinsta-page-header__content {
    display: flex;
    align-items: flex-start;
    gap: var(--header-gap);
    min-width: 0;
}

.ifinsta-page-header__main {
    flex: 1 1 100%;
    width: 100%;
    justify-content: space-between;
}

@media (max-width: 767px) {
    .ifinsta-page-header__main,
    .ifinsta-page-header__content {
        flex-direction: column;
        align-items: stretch;
    }
}

/* Content Block */
.ifinsta-page-header__content {
    flex: 1;
    min-width: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
}

/* Pretitle */
.ifinsta-page-header__pretitle {
    display: block;
    font-size: var(--ifinsta-text-xs);
    font-weight: var(--ifinsta-font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ifinsta-primary);
    margin-bottom: var(--ifinsta-space-1);
}

/* Title */
.ifinsta-page-title,
.ifinsta-page-header__title {
    display: flex;
    align-items: center;
    gap: var(--ifinsta-space-2);
    font-size: var(--title-size);
    font-weight: var(--ifinsta-font-semibold);
    color: var(--ifinsta-text-primary);
    letter-spacing: -0.025em;
    line-height: var(--ifinsta-leading-heading);
    margin: 0;
}

/* Subtitle */
.ifinsta-page-subtitle,
.ifinsta-page-header__subtitle {
    font-size: var(--subtitle-size);
    color: var(--ifinsta-text-secondary);
    margin: var(--ifinsta-space-0-5) 0 0;
    line-height: 1.45;
    max-width: 72ch;
}

/* Badge */
.ifinsta-page-header__badge {
    display: inline-flex;
    align-items: center;
    padding: var(--ifinsta-space-1) var(--ifinsta-space-2-5);
    background: var(--ifinsta-primary-alpha-10);
    color: var(--ifinsta-primary);
    font-size: var(--ifinsta-text-xs);
    font-weight: var(--ifinsta-font-semibold);
    border-radius: var(--ifinsta-radius-full);
    letter-spacing: 0;
}

/* Meta Items */
.ifinsta-page-header__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--ifinsta-space-2);
    margin-top: var(--ifinsta-space-2);
    padding-top: var(--ifinsta-space-2);
    border-top: 1px dashed var(--ifinsta-border);
}

.ifinsta-page-header__meta-item {
    display: inline-flex;
    align-items: center;
    gap: var(--ifinsta-space-1-5);
    font-size: var(--ifinsta-text-sm);
    color: var(--ifinsta-text-secondary);
}

.ifinsta-page-header__meta-item svg {
    color: var(--ifinsta-text-muted);
}

/* Actions */
.ifinsta-page-header__actions {
    display: flex;
    align-items: center;
    gap: var(--ifinsta-space-2);
    flex-shrink: 0;
}

.ifinsta-page-header__actions--responsive {
    display: flex;
    align-items: stretch;
    gap: var(--ifinsta-space-2);
    flex-wrap: nowrap;
    flex-shrink: 1;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    touch-action: pan-x pinch-zoom;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    mask-image: linear-gradient(to right, black calc(100% - 28px), transparent 100%);
    -webkit-mask-image: linear-gradient(to right, black calc(100% - 28px), transparent 100%);
    padding: var(--ifinsta-space-0-5);
    margin: calc(var(--ifinsta-space-0-5) * -1);
}

.ifinsta-page-header__actions--responsive::-webkit-scrollbar {
    display: none;
}

.ifinsta-page-header__actions--responsive > * {
    flex: 0 0 auto;
    scroll-snap-align: start;
}

.ifinsta-page-header__actions--responsive .ifinsta-btn {
    min-height: 40px;
    padding: var(--ifinsta-space-2) var(--ifinsta-space-3);
    font-size: var(--ifinsta-text-sm);
    white-space: nowrap;
}

.ifinsta-page-header__actions--responsive::after {
    content: '';
    flex: 0 0 var(--ifinsta-space-3);
    scroll-snap-align: end;
}

/* Scrollable Actions for Mobile */
@media (max-width: 767px) {
    .ifinsta-page-header__actions {
        width: 100%;
        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        overflow-x: visible;
        overflow-y: visible;
        gap: var(--ifinsta-space-2);
        padding: var(--ifinsta-space-1-5) 0 0 0;
        margin: 0;
        scrollbar-width: none;
        -ms-overflow-style: none;
        mask-image: none;
        -webkit-mask-image: none;
    }

    /* Responsive variant keeps horizontal scroll for many buttons */
    .ifinsta-page-header__actions--responsive {
        width: 100%;
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        overscroll-behavior-x: contain;
        scroll-snap-type: x mandatory;
        scroll-behavior: smooth;
        touch-action: pan-x pinch-zoom;
        -webkit-overflow-scrolling: touch;
        gap: var(--ifinsta-space-2);
        padding: var(--ifinsta-space-0-5) var(--ifinsta-space-0-5) var(--ifinsta-space-1);
        margin: calc(var(--ifinsta-space-0-5) * -1);
        /* Hide scrollbar but keep functionality */
        scrollbar-width: none;
        -ms-overflow-style: none;
        /* Mask to indicate scrollability */
        mask-image: linear-gradient(to right, black calc(100% - 28px), transparent 100%);
        -webkit-mask-image: linear-gradient(to right, black calc(100% - 28px), transparent 100%);
    }

    .ifinsta-page-header__actions::-webkit-scrollbar {
        display: none;
    }

    .ifinsta-page-header__actions--responsive::-webkit-scrollbar {
        display: none;
    }

    /* Standard actions stack vertically */
    .ifinsta-page-header__actions .ifinsta-btn {
        flex: 0 0 auto;
        scroll-snap-align: start;
        white-space: nowrap;
        justify-content: center;
        width: 100%;
        min-height: 40px;
        padding: var(--ifinsta-space-2) var(--ifinsta-space-3);
    }

    /* Responsive actions scroll horizontally */
    .ifinsta-page-header__actions--responsive .ifinsta-btn {
        flex: 0 0 auto;
        scroll-snap-align: start;
        white-space: nowrap;
        justify-content: center;
        min-height: 40px;
        padding: var(--ifinsta-space-2) var(--ifinsta-space-3);
    }

    /* Primary action should be last and prominent in responsive mode */
    .ifinsta-page-header__actions--responsive .ifinsta-btn--primary {
        scroll-snap-align: end;
    }

    /* Visual padding at end for better scrolling in responsive mode */
    .ifinsta-page-header__actions--responsive::after {
        content: '';
        flex: 0 0 var(--ifinsta-space-4);
        scroll-snap-align: end;
    }
}

/* Desktop - normal layout */
@media (min-width: 768px) {
    .ifinsta-page-header__actions {
        flex-wrap: wrap;
    }

    .ifinsta-page-header__content {
        flex: 1 1 20rem;
        min-width: min(100%, 20rem);
    }

    .ifinsta-page-header__actions--responsive {
        flex: 0 1 auto;
        flex-wrap: nowrap;
        justify-content: flex-end;
        overflow-x: auto;
        overflow-y: hidden;
        overscroll-behavior-x: contain;
        scroll-snap-type: x proximity;
        scroll-behavior: smooth;
        touch-action: pan-x pinch-zoom;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        min-width: 0;
        max-width: 100%;
        mask-image: linear-gradient(to right, black calc(100% - 28px), transparent 100%);
        -webkit-mask-image: linear-gradient(to right, black calc(100% - 28px), transparent 100%);
        padding: var(--ifinsta-space-0-5);
        margin: calc(var(--ifinsta-space-0-5) * -1) 0 calc(var(--ifinsta-space-0-5) * -1) auto;
    }
}

.ifinsta-page-header__action-btn,
.ifinsta-page-header__actions .ifinsta-btn--primary {
    min-height: 40px;
    box-shadow: none;
    transition: all var(--ifinsta-duration-fast) var(--ifinsta-ease-fluent);
}

.ifinsta-page-header__actions--responsive .ifinsta-page-header__action-btn {
    border-radius: var(--ifinsta-radius-md);
    box-shadow: none;
}

.ifinsta-page-header__actions--responsive .ifinsta-btn--secondary.ifinsta-page-header__action-btn,
.ifinsta-page-header__actions--responsive .ifinsta-page-header__action-btn:not(.ifinsta-btn--primary) {
    background: var(--ifinsta-card-bg-gmail);
    border: var(--ifinsta-card-border-gmail);
    color: var(--ifinsta-text-primary);
}

.ifinsta-page-header__action-btn:hover,
.ifinsta-page-header__actions .ifinsta-btn--primary:hover {
    border-color: var(--ifinsta-primary-hover);
}

.ifinsta-page-header__actions--responsive .ifinsta-btn--secondary.ifinsta-page-header__action-btn:hover,
.ifinsta-page-header__actions--responsive .ifinsta-page-header__action-btn:not(.ifinsta-btn--primary):hover {
    background: var(--ifinsta-card-bg-hover-gmail);
    border-color: var(--ifinsta-card-border-hover-gmail);
}

/* Accent Variant - Modern Gradient Header */
.ifinsta-page-header--accent {
    --header-padding: var(--ifinsta-space-8);

    background: linear-gradient(135deg, var(--ifinsta-bg-elevated) 0%, var(--ifinsta-primary-50) 100%);
    border: 1px solid var(--ifinsta-primary-100);
    border-radius: var(--ifinsta-radius-xl);
    padding: var(--header-padding);
    margin-bottom: var(--ifinsta-space-6);
    overflow: hidden;
    position: relative;
}

.ifinsta-page-header--accent .ifinsta-page-title,
.ifinsta-page-header--accent .ifinsta-page-header__title {
    background: linear-gradient(135deg, var(--ifinsta-text) 0%, var(--ifinsta-primary-700) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ifinsta-page-header--accent .ifinsta-page-header__back-link:hover,
.ifinsta-page-header--accent > a:first-child.ifinsta-btn--ghost:hover {
    background: var(--ifinsta-white-alpha-70);
}

/* Decorative Elements for Accent Variant */
.ifinsta-page-header--accent::before,
.ifinsta-page-header--accent::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    pointer-events: none;
}

.ifinsta-page-header--accent::before {
    width: 200px;
    height: 200px;
    background: var(--ifinsta-primary-200);
    top: -50px;
    right: -50px;
    opacity: 0.5;
}

.ifinsta-page-header--accent::after {
    width: 150px;
    height: 150px;
    background: rgba(var(--ifinsta-violet-500-rgb), 0.2);
    bottom: -30px;
    right: 100px;
    opacity: 0.3;
}

/* Compact Accent Variant */
.ifinsta-page-header--accent.ifinsta-page-header--compact {
    --header-padding: var(--ifinsta-space-5);
}

.ifinsta-page-header--accent.ifinsta-page-header--compact::before {
    width: 120px;
    height: 120px;
}

.ifinsta-page-header--accent.ifinsta-page-header--compact::after {
    width: 80px;
    height: 80px;
}

/* Stack Mobile Variant */
.ifinsta-page-header--stack-mobile {
    align-items: flex-start;
}

@media (max-width: 767px) {
    .ifinsta-page-header--stack-mobile {
        flex-direction: column;
    }

    .ifinsta-page-header--stack-mobile .ifinsta-page-header__content,
    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions,
    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions--responsive {
        width: 100%;
    }

    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions:not(.ifinsta-page-header__actions--responsive) {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--ifinsta-space-2);
    }

    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions:not(.ifinsta-page-header__actions--responsive) > * {
        width: 100%;
    }

    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions:not(.ifinsta-page-header__actions--responsive) .ifinsta-page-header__action-btn,
    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions:not(.ifinsta-page-header__actions--responsive) .ifinsta-btn {
        width: 100%;
        justify-content: center;
    }

    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions--responsive .ifinsta-page-header__action-btn,
    .ifinsta-page-header--stack-mobile .ifinsta-page-header__actions--responsive .ifinsta-btn {
        width: auto;
        max-width: none;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .ifinsta-page-header__back-link,
    .ifinsta-page-header > a:first-child.ifinsta-btn--ghost,
    .ifinsta-page-header__back-link svg,
    .ifinsta-page-header > a:first-child.ifinsta-btn--ghost svg,
    .ifinsta-page-header__breadcrumb a,
    .ifinsta-page-header > nav.ifinsta-breadcrumb a,
    .ifinsta-page-header__action-btn,
    .ifinsta-page-header__actions .ifinsta-btn--primary {
        transition: none;
    }

    .ifinsta-page-header__back-link:hover svg,
    .ifinsta-page-header > a:first-child.ifinsta-btn--ghost:hover svg {
        transform: none;
    }

    .ifinsta-page-header__action-btn:hover,
    .ifinsta-page-header__actions .ifinsta-btn--primary:hover {
        transform: none;
    }
}

/* RTL Support */
[dir="rtl"] .ifinsta-page-header__back-link,
[dir="rtl"] .ifinsta-page-header > a:first-child.ifinsta-btn--ghost {
    margin-left: 0;
    margin-right: calc(var(--ifinsta-space-3) * -1);
}

[dir="rtl"] .ifinsta-page-header__back-link:hover svg,
[dir="rtl"] .ifinsta-page-header > a:first-child.ifinsta-btn--ghost:hover svg {
    transform: translateX(3px);
}