/* ========================================
   MOBILE RESPONSIVE STYLES - P0
   ======================================== */

/* Mobile Top Bar (hidden on desktop) */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1001;
    align-items: center;
    padding: 0 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.mobile-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    margin: 0;
    flex: 1;
    text-align: center;
}

.menu-toggle {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hamburger-icon {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    position: relative;
    transition: background 0.3s, transform 0.3s;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    left: 0;
    transition: transform 0.3s, top 0.3s;
}

.hamburger-icon::before {
    top: -6px;
}

.hamburger-icon::after {
    top: 6px;
}

body.sidebar-open .hamburger-icon {
    background: transparent;
}

body.sidebar-open .hamburger-icon::before {
    top: 0;
    transform: rotate(45deg);
}

body.sidebar-open .hamburger-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

.mobile-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    padding: 0.5rem;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.icon-btn:hover {
    opacity: 1;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

body.sidebar-open {
    overflow: hidden;
}

/* ========================================
   MEDIA QUERIES
   ======================================== */

@media (max-width: 1024px) {
    .sidebar {
        width: 280px;
        padding: 1.5rem;
    }

    :root {
        --wrapper-padding: 24px;
    }
}

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

    .sidebar-overlay {
        display: block;
    }

    .app-container {
        flex-direction: column;
        padding-top: 56px;
    }

    /* CRITICAL: Prevent browser touch gestures on canvas */
    .preview-wrapper {
        touch-action: none;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: min(85vw, 320px);
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-area {
        height: calc(100vh - 56px);
        width: 100%;
    }

    :root {
        --wrapper-padding: 20px;
    }

    .status-bar {
        font-size: 0.7rem;
        padding-top: 1rem;
    }
}

@media (max-width: 640px) {
    :root {
        --wrapper-padding: 16px;
    }

    .sidebar {
        width: min(90vw, 300px);
        padding: 1.25rem;
    }

    .controls {
        gap: 1.2rem;
    }

    .control-group label {
        font-size: 0.75rem;
    }

    input[type="number"],
    input[type="text"] {
        font-size: 16px;
        padding: 0.7rem 0.9rem;
    }

    .btn {
        padding: 0.9rem;
        font-size: 0.9rem;
    }

    .status-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.4rem;
    }

    .drop-card {
        width: 90%;
        padding: 1.5rem;
    }

    .drop-card .icon {
        font-size: 2rem;
    }

    .drop-card h3 {
        font-size: 1.1rem;
    }

    .preview-hint {
        font-size: 11px;
        padding: 6px 10px;
        right: 12px;
        bottom: 12px;
    }
}

@media (max-width: 375px) {
    .sidebar {
        padding: 1rem;
    }

    .control-group label {
        font-size: 0.7rem;
    }

    .mobile-title {
        font-size: 1rem;
    }
}