/* ===================================
   Layout Styles
   =================================== */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Sticky Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
    padding: 0 var(--spacing-lg);
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--header-text);
    font-size: 1.25rem;
    font-weight: bold;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Hamburger Menu Button */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    padding: 6px;
}

.hamburger-menu span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--header-text);
    transition: all var(--transition-fast);
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Main Content Layout */
.main-content {
    display: flex;
    flex: 1;
}

/* Left Sidebar (Menu/Navigation) */
.sidebar {
    flex: 0 0 var(--sidebar-width);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-primary);
    transition: transform var(--transition-normal);
}

/* Sidebar Overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay.active {
    opacity: 1;
}

/* Center Content Area */
.content-area {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* Right Panel (Settings) */
.settings-panel {
    flex: 0 0 var(--settings-width);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-primary);
}

/* Sections */
.section-title {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-section {
    margin-bottom: var(--spacing-lg);
}

.settings-section {
    margin-bottom: var(--spacing-lg);
}

.generate-section {
    margin-bottom: var(--spacing-lg);
}

.history-section {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.history-actions {
    display: flex;
    justify-content: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-primary);
    margin-top: var(--spacing-md);
}

.history h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        flex: none;
        border: none;
        border-bottom: 1px solid var(--border-primary);
    }

    .settings-panel {
        flex: none;
        border: none;
        border-top: 1px solid var(--border-primary);
    }
}

@media (max-width: 768px) {
    /* Show hamburger menu on mobile */
    .hamburger-menu {
        display: flex;
    }

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

    .header {
        padding: 0 var(--spacing-md);
    }

    /* Hide sidebar by default on mobile */
    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: 0;
        bottom: 0;
        width: var(--sidebar-width);
        z-index: 99;
        transform: translateX(-100%);
        border-right: 1px solid var(--border-primary);
    }

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

    /* Show overlay when sidebar is active */
    .sidebar-overlay {
        display: block;
    }

    /* Adjust content area */
    .content-area {
        padding: var(--spacing-md);
    }

    .settings-panel {
        padding: var(--spacing-md);
    }

    .result-number {
        font-size: 3rem;
    }
}