/* =============================
   Side Menu Styles
   ============================= */

.side-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease), visibility 0.3s;
}

.side-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.side-menu {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    max-width: 85vw;
    background: var(--card);
    box-shadow: none;
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform 0.3s var(--ease-out);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.side-menu.active {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
}

.side-menu-header {
    padding: 40px 24px 32px;
    padding-top: calc(40px + env(safe-area-inset-top));
    background: var(--card);
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.side-menu-header h1 {
    margin: 0;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.side-menu-header .app-subtitle {
    display: none;
}

.side-menu-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
}

.side-menu-item {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s var(--ease), color 0.2s var(--ease);
    position: relative;
}

.side-menu-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary);
    transition: height 0.2s var(--ease);
    border-radius: 0 3px 3px 0;
}

.side-menu-item:hover {
    background: var(--bg-secondary);
}

.side-menu-item:hover::before {
    height: 60%;
}

.side-menu-item:active {
    background: var(--border);
}

.side-menu-item-icon {
    width: 20px;
    height: 20px;
    margin-right: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary);
}

.side-menu-divider {
    height: 1px;
    background: var(--border);
    margin: 8px 24px;
}

.hamburger-btn {
    appearance: none;
    background: transparent;
    border: none;
    width: 44px;
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 10px;
    border-radius: var(--radius-md);
    transition: background 0.2s var(--ease);
    flex-shrink: 0;
    position: relative;
    z-index: 10;
}

.hamburger-btn:hover {
    background: var(--bg-secondary);
}

.hamburger-btn:active {
    background: var(--border);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s var(--ease);
    display: block;
}

.hamburger-line:not(:last-child) {
    margin-bottom: 4px;
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* About Dialog Styles */
.about-dialog {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease), visibility 0.3s;
    padding: 20px;
}

.about-dialog.active {
    opacity: 1;
    visibility: visible;
}

.about-dialog-content {
    background: var(--card);
    border-radius: var(--radius-xl);
    padding: 32px 24px 24px;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: transform 0.3s var(--ease-out);
}

.about-dialog.active .about-dialog-content {
    transform: scale(1);
}

.about-dialog-header {
    text-align: center;
    margin-bottom: 24px;
}

.about-dialog-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.about-dialog-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 4px;
}

.about-dialog-version {
    font-size: 14px;
    color: var(--muted);
    font-weight: 500;
}

.about-dialog-body {
    margin-bottom: 24px;
}

.about-update-status {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    margin-bottom: 16px;
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
}

.about-update-status.has-update {
    background: rgba(52, 199, 89, 0.1);
    border-color: rgba(52, 199, 89, 0.3);
}

.about-update-status.up-to-date {
    background: rgba(52, 199, 89, 0.08);
    border-color: rgba(52, 199, 89, 0.2);
    justify-content: center;
    padding: 10px 16px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.about-update-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.about-update-text {
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Modern green checkmark icon for up-to-date status */
.about-update-status.up-to-date .about-update-text::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2334c759' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    flex-shrink: 0;
}

.about-info-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
}

.about-info-row:last-child {
    border-bottom: none;
}

.about-info-label {
    font-size: 14px;
    color: var(--muted);
    font-weight: 500;
}

.about-info-value {
    font-size: 14px;
    color: var(--text);
    font-weight: 600;
}

.about-dialog-footer {
    display: flex;
    gap: 12px;
}

.about-dialog-footer .btn {
    flex: 1;
}

/* File input hidden */
.hidden-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}