:root {
    --ios-bg: #F2F2F7;
    --ios-white: #FFFFFF;
    --ios-blue: #007AFF;
    --ios-gray: #8E8E93;
    --ios-border: #C6C6C8;
    --ios-text: #000000;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--ios-bg);
    color: var(--ios-text);
    line-height: 1.4;
    overflow-x: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
header {
    background-color: var(--ios-bg);
    padding: 60px 16px 10px;
    position: sticky;
    top: 0;
    z-index: 10;
}

header h1 {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Main Content */
main {
    flex: 1;
    overflow-y: auto;
    padding: 0 16px 100px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Remote Tab */
.remote-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 10px;
}

.ios-btn {
    background-color: var(--ios-white);
    border: none;
    border-radius: 14px;
    padding: 30px 16px;
    font-size: 17px;
    font-weight: 600;
    color: var(--ios-blue);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
}

.ios-btn:active {
    transform: scale(0.96);
    background-color: #E5E5EA;
}

.ios-btn.primary {
    background-color: var(--ios-blue);
    color: white;
}

.ios-btn.secondary {
    background-color: #FF3B30;
    color: white;
}

/* Log Tab */
.log-list {
    background-color: var(--ios-white);
    border-radius: 12px;
    overflow: hidden;
}

.log-item {
    padding: 12px 16px;
    border-bottom: 0.5px solid var(--ios-border);
    display: flex;
    flex-direction: column;
}

.log-item:last-child {
    border-bottom: none;
}

.log-time {
    font-size: 12px;
    color: var(--ios-gray);
    margin-bottom: 2px;
}

.log-msg {
    font-size: 16px;
}

/* Settings Tab */
.settings-list {
    background-color: var(--ios-white);
    border-radius: 12px;
    overflow: hidden;
}

.settings-item {
    padding: 14px 16px;
    border-bottom: 0.5px solid var(--ios-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-item:last-child {
    border-bottom: none;
}

.settings-item label {
    font-size: 17px;
}

/* Tab Bar */
.tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 84px;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 0.5px solid var(--ios-border);
    display: flex;
    justify-content: space-around;
    padding-top: 8px;
    padding-bottom: 24px;
}

.tab-btn {
    background: none;
    border: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--ios-gray);
    flex: 1;
    cursor: pointer;
}

.tab-btn .icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.tab-btn span {
    font-size: 10px;
    font-weight: 500;
}

.tab-btn.active {
    color: var(--ios-blue);
}