/**
 * UniversalDrawer - Generic Drawer/Modal Styles
 *
 * Modern, clean design with smooth animations.
 * Fully responsive with mobile-first approach.
 * Based on CartPopup pattern.
 */

/* ========== CSS VARIABLES ========== */
.universal-drawer {
    /* SIZING */
    --drawer-width-sm: 320px;
    --drawer-width-md: 420px;
    --drawer-width-lg: 580px;
    --drawer-width-xl: 720px;
    --drawer-max-height: calc(100vh - 40px);
    --drawer-max-height: calc(100dvh - 40px); /* Dynamic viewport for mobile browsers */

    /* COLORS */
    --drawer-bg: #ffffff;
    --drawer-overlay-bg: rgba(0, 0, 0, 0.5);
    --drawer-border-radius: 16px;
    --drawer-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* PRIMARY - inherit from page accent or use defaults */
    --drawer-primary: var(--btn-primary-bg, var(--accent-color, #0d6efd));
    --drawer-primary-hover: var(--btn-primary-hover-bg, var(--accent-color-dark, #0b5ed7));

    /* SECONDARY */
    --drawer-secondary: #f3f4f6;
    --drawer-secondary-hover: #e5e7eb;

    /* SUCCESS */
    --drawer-success: #10b981;
    --drawer-success-bg: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);

    /* DANGER */
    --drawer-danger: #ef4444;

    /* TEXT */
    --drawer-text: #1f2937;
    --drawer-text-muted: #6b7280;

    /* BORDERS */
    --drawer-border: #e5e7eb;

    /* SPACING */
    --drawer-padding: 1.25rem;
    --drawer-gap: 1rem;

    /* ANIMATION */
    --drawer-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-INDEX */
    --drawer-z-index: 9999;
}

/* Size variants */
.universal-drawer--sm { --drawer-width: var(--drawer-width-sm); }
.universal-drawer--md { --drawer-width: var(--drawer-width-md); }
.universal-drawer--lg { --drawer-width: var(--drawer-width-lg); }
.universal-drawer--xl { --drawer-width: var(--drawer-width-xl); }
.universal-drawer--full { --drawer-width: 100vw; }

/* ========== BODY LOCK ========== */
body.universal-drawer-body-lock {
    overflow: hidden;
    padding-right: var(--scrollbar-width, 0);
}

/* Hide floating buttons when drawer is open (they have z-index > drawer) */
body.universal-drawer-body-lock .scroll-top,
body.universal-drawer-body-lock .mobile-menu-toggle,
body.universal-drawer-body-lock .menu-tooltip,
body.universal-drawer-body-lock .header-edit-button {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    transition: opacity 0.15s ease, visibility 0.15s ease !important;
}

/* Force navigation below drawer z-index when drawer is open */
body.universal-drawer-body-lock .navigation-wrapper,
body.universal-drawer-body-lock .navbar,
body.universal-drawer-body-lock .settings-header,
body.universal-drawer-body-lock header,
body.universal-drawer-body-lock .mobile-nav-backdrop,
body.universal-drawer-body-lock .editor-control-bar {
    z-index: 1 !important;
}

/* ========== MAIN CONTAINER ========== */
.universal-drawer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--drawer-z-index);
    pointer-events: none;
    display: flex;
    padding: 20px;
}

/* Position variants */
.universal-drawer--right {
    justify-content: flex-end;
    align-items: center; /* Centered vertically like a proper side panel */
}

.universal-drawer--left {
    justify-content: flex-start;
    align-items: center; /* Centered vertically like a proper side panel */
}

.universal-drawer--center {
    justify-content: center;
    align-items: center;
}

.universal-drawer--bottom {
    justify-content: center;
    align-items: flex-end;
}

/* ========== OVERLAY ========== */
.universal-drawer__overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1; /* Below container */
    background: var(--drawer-overlay-bg);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity var(--drawer-transition);
    pointer-events: none;
}

.universal-drawer--open .universal-drawer__overlay {
    opacity: 1;
    pointer-events: auto;
}

/* ========== DRAWER CONTAINER ========== */
.universal-drawer__container {
    position: relative;
    z-index: 2; /* Above overlay */
    width: var(--drawer-width);
    max-width: calc(100vw - 40px);
    max-height: var(--drawer-max-height);
    background: var(--drawer-bg);
    border-radius: var(--drawer-border-radius);
    box-shadow: var(--drawer-shadow);
    display: flex;
    flex-direction: column;
    opacity: 0;
    transition: transform var(--drawer-transition), opacity var(--drawer-transition);
    pointer-events: none;
    overflow: hidden;
}

/* Transform variants based on position */
.universal-drawer--right .universal-drawer__container {
    transform: translateX(100%);
    height: var(--drawer-max-height); /* Side panels should fill full height */
}

.universal-drawer--left .universal-drawer__container {
    transform: translateX(-100%);
    height: var(--drawer-max-height); /* Side panels should fill full height */
}

.universal-drawer--center .universal-drawer__container {
    transform: translateY(-30px) scale(0.95);
}

.universal-drawer--bottom .universal-drawer__container {
    transform: translateY(100%);
    border-radius: var(--drawer-border-radius) var(--drawer-border-radius) 0 0;
}

/* Open state */
.universal-drawer--open .universal-drawer__container {
    opacity: 1;
    pointer-events: auto;
}

.universal-drawer--right.universal-drawer--open .universal-drawer__container,
.universal-drawer--left.universal-drawer--open .universal-drawer__container {
    transform: translateX(0);
}

.universal-drawer--center.universal-drawer--open .universal-drawer__container {
    transform: translateY(0) scale(1);
}

.universal-drawer--bottom.universal-drawer--open .universal-drawer__container {
    transform: translateY(0);
}

/* ========== HEADER ========== */
.universal-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--drawer-padding);
    border-bottom: 1px solid var(--drawer-border);
    flex-shrink: 0;
}

.universal-drawer__title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--drawer-text);
}

.universal-drawer__title i {
    font-size: 1.125rem;
    color: var(--drawer-primary);
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25em;
    height: 1.25em;
}

.universal-drawer__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: 8px;
    color: var(--drawer-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.universal-drawer__close:hover {
    background: var(--drawer-border);
    color: var(--drawer-text);
}

/* ========== SUCCESS MESSAGE ========== */
.universal-drawer__success {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem var(--drawer-padding);
    background: var(--drawer-success-bg);
    color: #065f46;
    font-size: 0.875rem;
    font-weight: 500;
    transform: translateY(-100%);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all var(--drawer-transition);
}

.universal-drawer__success--visible {
    transform: translateY(0);
    opacity: 1;
    max-height: 60px;
}

.universal-drawer__success i {
    font-size: 1rem;
    color: var(--drawer-success);
}

/* ========== CONTENT AREA ========== */
.universal-drawer__content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 100px;
    position: relative;
}

/* Scrollbar styling */
.universal-drawer__content::-webkit-scrollbar {
    width: 6px;
}

.universal-drawer__content::-webkit-scrollbar-track {
    background: transparent;
}

.universal-drawer__content::-webkit-scrollbar-thumb {
    background: var(--drawer-border);
    border-radius: 3px;
}

.universal-drawer__content::-webkit-scrollbar-thumb:hover {
    background: #d1d5db;
}

/* Body (main content) */
.universal-drawer__body {
    padding: var(--drawer-padding);
}

/* ========== LOADING STATE ========== */
.universal-drawer__loading {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    text-align: center;
}

.universal-drawer--loading .universal-drawer__loading {
    display: flex;
}

.universal-drawer--loading .universal-drawer__body,
.universal-drawer--loading .universal-drawer__empty {
    display: none !important;
}

.universal-drawer__loading .spinner-border {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--drawer-primary);
}

.universal-drawer__loading-text {
    color: var(--drawer-text-muted);
    font-size: 0.9rem;
}

/* ========== EMPTY STATE ========== */
.universal-drawer__empty {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem var(--drawer-padding);
    text-align: center;
    color: var(--drawer-text-muted);
}

.universal-drawer--empty .universal-drawer__empty {
    display: flex;
}

.universal-drawer--empty .universal-drawer__body {
    display: none !important;
}

.universal-drawer__empty i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--drawer-text-muted);
}

.universal-drawer__empty p {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

/* Empty state button - theme colors */
.universal-drawer__empty .btn-outline-primary {
    --bs-btn-color: var(--drawer-primary);
    --bs-btn-border-color: var(--drawer-primary);
    --bs-btn-hover-bg: var(--drawer-primary);
    --bs-btn-hover-border-color: var(--drawer-primary);
    color: var(--drawer-primary);
    border-color: var(--drawer-primary);
}

.universal-drawer__empty .btn-outline-primary:hover {
    background: var(--drawer-primary);
    border-color: var(--drawer-primary);
    color: #fff;
}

/* ========== FOOTER ========== */
.universal-drawer__footer {
    border-top: 1px solid var(--drawer-border);
    padding: var(--drawer-padding);
    flex-shrink: 0;
    background: var(--drawer-bg);
}

/* ========== BUTTON SYSTEM ========== */
.universal-drawer__actions {
    display: grid;
    gap: 0.75rem;
}

/* 1 button - centered */
.universal-drawer__actions--1 {
    grid-template-columns: 1fr;
    max-width: 280px;
    margin: 0 auto;
}

/* 2 buttons - 50/50 grid */
.universal-drawer__actions--2 {
    grid-template-columns: 1fr 1fr;
}

/* 3+ buttons - auto-fit grid */
.universal-drawer__actions--multi {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

/* Base button styles */
.universal-drawer__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    white-space: nowrap;
}

.universal-drawer__btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.universal-drawer__btn .spinner-border {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

/* Button variants */
.universal-drawer__btn--primary {
    background: var(--drawer-primary);
    color: #fff;
}

.universal-drawer__btn--primary:hover:not(:disabled) {
    background: var(--drawer-primary-hover);
    color: #fff;
}

.universal-drawer__btn--secondary {
    background: var(--drawer-secondary);
    color: var(--drawer-text);
}

.universal-drawer__btn--secondary:hover:not(:disabled) {
    background: var(--drawer-secondary-hover);
}

.universal-drawer__btn--danger {
    background: var(--drawer-danger);
    color: #fff;
}

.universal-drawer__btn--danger:hover:not(:disabled) {
    background: #dc2626;
    color: #fff;
}

.universal-drawer__btn--success {
    background: var(--drawer-success);
    color: #fff;
}

.universal-drawer__btn--success:hover:not(:disabled) {
    background: #059669;
    color: #fff;
}

.universal-drawer__btn--outline-primary {
    background: transparent;
    color: var(--drawer-primary);
    border: 1px solid var(--drawer-primary);
}

.universal-drawer__btn--outline-primary:hover:not(:disabled) {
    background: var(--drawer-primary);
    color: #fff;
}

.universal-drawer__btn--outline-secondary {
    background: transparent;
    color: var(--drawer-text);
    border: 1px solid var(--drawer-border);
}

.universal-drawer__btn--outline-secondary:hover:not(:disabled) {
    background: var(--drawer-secondary);
}

.universal-drawer__btn--outline-danger {
    background: transparent;
    color: var(--drawer-danger);
    border: 1px solid var(--drawer-danger);
}

.universal-drawer__btn--outline-danger:hover:not(:disabled) {
    background: var(--drawer-danger);
    color: #fff;
}

/* ========== RESPONSIVE - MOBILE ========== */
@media (max-width: 640px) {
    /* Fix for mobile browsers with bottom navigation bars */
    .universal-drawer {
        padding: 0;
        /* Use dvh for proper height on mobile with browser chrome */
        height: 100vh;
        height: 100dvh;
        bottom: auto; /* Don't rely on bottom: 0 which uses layout viewport */
    }

    /* Overlay should also use dvh on mobile */
    .universal-drawer .universal-drawer__overlay {
        height: 100vh;
        height: 100dvh;
        bottom: auto;
    }

    /* ===== FULLSCREEN MODE ===== */
    .universal-drawer--mobile-fullscreen .universal-drawer__container {
        width: 100%;
        max-width: 100%;
        height: 100vh;
        height: 100dvh;
        max-height: none;
        border-radius: 0;
    }

    .universal-drawer--mobile-fullscreen.universal-drawer--right .universal-drawer__container,
    .universal-drawer--mobile-fullscreen.universal-drawer--left .universal-drawer__container,
    .universal-drawer--mobile-fullscreen.universal-drawer--center .universal-drawer__container,
    .universal-drawer--mobile-fullscreen.universal-drawer--bottom .universal-drawer__container {
        transform: translateY(100%);
    }

    .universal-drawer--mobile-fullscreen.universal-drawer--open .universal-drawer__container {
        transform: translateY(0);
    }

    /* Fullscreen footer - fixed at bottom */
    .universal-drawer--mobile-fullscreen .universal-drawer__footer {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 10000;
        background: var(--drawer-bg);
        border-top: 1px solid var(--drawer-border);
        border-radius: 16px 16px 0 0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
        padding: 1rem;
        padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
    }

    /* Content padding for fixed footer */
    .universal-drawer--mobile-fullscreen .universal-drawer__content {
        padding-bottom: 200px;
        -webkit-overflow-scrolling: touch;
    }

    /* Hide footer when closed (since it's position: fixed) */
    .universal-drawer--mobile-fullscreen:not(.universal-drawer--open) .universal-drawer__footer {
        transform: translateY(100%);
        opacity: 0;
        pointer-events: none;
    }

    .universal-drawer--mobile-fullscreen.universal-drawer--open .universal-drawer__footer {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    }

    /* ===== BOTTOM SHEET MODE ===== */
    .universal-drawer--mobile-sheet .universal-drawer__container {
        width: 100%;
        max-width: 100%;
        max-height: 90dvh;
        border-radius: 20px 20px 0 0;
        transform: translateY(100%);
    }

    .universal-drawer--mobile-sheet.universal-drawer--open .universal-drawer__container {
        transform: translateY(0);
    }

    /* Bottom sheet handle bar */
    .universal-drawer--mobile-sheet .universal-drawer__header::before {
        content: '';
        position: absolute;
        top: 8px;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 4px;
        background: var(--drawer-border);
        border-radius: 2px;
    }

    .universal-drawer--mobile-sheet .universal-drawer__header {
        position: relative;
        padding-top: calc(var(--drawer-padding) + 8px);
    }

    /* ===== BUTTON LAYOUT MOBILE ===== */
    .universal-drawer__actions--multi {
        grid-template-columns: 1fr;
    }

    .universal-drawer__btn {
        padding: 0.875rem 1rem;
    }

    /* Header safe area */
    .universal-drawer--mobile-fullscreen .universal-drawer__header {
        padding-top: calc(var(--drawer-padding) + env(safe-area-inset-top, 0px));
    }
}

/* ========== TABLET ADJUSTMENTS ========== */
@media (min-width: 641px) and (max-width: 768px) {
    .universal-drawer__container {
        max-width: calc(100vw - 60px);
    }
}

/* ========== ANIMATIONS ========== */
@keyframes drawer-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.universal-drawer--shake .universal-drawer__container {
    animation: drawer-shake 0.3s ease;
}

/* ========== DARK MODE SUPPORT ========== */
@media (prefers-color-scheme: dark) {
    .universal-drawer[data-theme="auto"] {
        --drawer-bg: #1f2937;
        --drawer-text: #f9fafb;
        --drawer-text-muted: #9ca3af;
        --drawer-border: #374151;
        --drawer-secondary: #374151;
        --drawer-secondary-hover: #4b5563;
        --drawer-overlay-bg: rgba(0, 0, 0, 0.7);
    }
}

/* ========== PRINT ========== */
@media print {
    .universal-drawer {
        display: none !important;
    }
}