:root {
    --dracula-bg: #282a36;
    --dracula-current-line: #44475a;
    --dracula-selection: #44475a;
    --dracula-fg: #f8f8f2;
    --dracula-comment: #6272a4;
    --dracula-cyan: #8be9fd;
    --dracula-green: #50fa7b;
    --dracula-orange: #ffb86c;
    --dracula-pink: #ff79c6;
    --dracula-purple: #bd93f9;
    --dracula-red: #ff5555;
    --dracula-yellow: #f1fa8c;
}

[data-theme="light"] {
    --bg: #f8f8f2;
    --bg-secondary: #ffffff;
    --text: #1a1a1a;
    --text-secondary: #2d2d3a;
    --accent: #bd93f9;
    --accent-hover: #8be9fd;
    --border: #e0e0e0;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --warning-bg: #fff4e6;
    --warning-border: #ffb86c;
    --warning-text: #8b6914;
    --stat-bg: #f5f5f5;
    --tab-bg: #ffffff;
}

[data-theme="dark"] {
    --bg: #282a36;
    --bg-secondary: #21222c;
    --text: #ffffff;
    --text-secondary: #b4b9d6;
    --accent: #bd93f9;
    --accent-hover: #8be9fd;
    --border: #44475a;
    --card-bg: #343746;
    --nav-bg: rgba(40, 42, 54, 0.95);
    --warning-bg: #3d3520;
    --warning-border: #ffb86c;
    --warning-text: #ffb86c;
    --stat-bg: #2d2d3a;
    --tab-bg: #343746;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.7;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "kern" 1;
    text-rendering: optimizeLegibility;
    transition: background-color 0.3s ease, color 0.3s ease;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.navbar {
    position: sticky;
    top: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-logo:hover {
    color: var(--accent-hover);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--text);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text);
}

.theme-toggle:hover {
    background-color: var(--border);
    transform: scale(1.05);
}

.theme-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
    color: var(--text);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(15deg);
}

.theme-icon .sun-circle,
.theme-icon .sun-ray {
    opacity: 0;
    transform: scale(0);
    transition: all 0.3s ease;
}

.theme-icon .moon-path {
    opacity: 1;
    transform: scale(1);
    transition: all 0.3s ease;
}

[data-theme="light"] .theme-icon .sun-circle,
[data-theme="light"] .theme-icon .sun-ray {
    opacity: 1;
    transform: scale(1);
}

[data-theme="light"] .theme-icon .moon-path {
    opacity: 0;
    transform: scale(0);
}

.main-content {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.app-header {
    padding: 1.25rem 2rem;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border);
    background-color: var(--bg);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 0.25rem;
    color: var(--text);
}

.app-header p {
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: -0.01em;
    color: var(--text-secondary);
}

.app-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: stretch;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.left-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
    background-color: var(--bg);
    overflow-y: auto;
    position: relative;
}

.left-panel::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--border) 20%, var(--border) 80%, transparent);
    pointer-events: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.stat-box {
    background-color: var(--stat-bg);
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
}

.stat-box:hover {
    background-color: var(--card-bg);
    border-color: var(--border);
    transform: translateY(-1px);
}

.stat-label {
    font-size: 0.6875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

.encoding-badge {
    background-color: var(--stat-bg);
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    cursor: default;
    text-align: center;
    font-family: inherit;
    letter-spacing: 0.02em;
    transition: all 0.2s ease;
}

.encoding-badge:hover {
    background-color: var(--card-bg);
    border-color: var(--border);
}

.char-display {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.char-value {
    font-size: 1.625rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1;
}

.char-max {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 3px;
    background-color: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 0.375rem;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent);
    transition: width 0.3s ease;
    width: 0%;
    border-radius: 2px;
}

.stat-value-large {
    font-size: 1.625rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
    min-height: 0;
}

.input-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.input-label-row label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}

.paste-hint {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.sms-input {
    width: 100%;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
    font-size: 0.95rem;
    line-height: 1.6;
    letter-spacing: -0.01em;
    resize: none;
    flex: 1;
    min-height: 200px;
    outline: none;
    transition: all 0.2s ease;
    caret-color: var(--accent);
}

.sms-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(189, 147, 249, 0.15);
    background-color: var(--bg-secondary);
}

.sms-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.action-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.action-btn {
    flex: 1;
    min-width: 90px;
    background-color: var(--stat-bg);
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 0.75rem 1.25rem;
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    letter-spacing: -0.01em;
}

.action-btn:hover {
    background-color: var(--card-bg);
    border-color: var(--border);
    color: var(--accent);
}

.action-btn:active {
    transform: translateY(0);
}

.right-panel {
    display: flex;
    flex-direction: column;
    background-color: var(--bg);
    overflow: hidden;
    height: 100%;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    background-color: var(--bg);
    padding: 0;
    position: relative;
}

.tabs::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border) 10%, var(--border) 90%, transparent);
}

.tabs::-webkit-scrollbar {
    height: 4px;
}

.tabs::-webkit-scrollbar-track {
    background: transparent;
}

.tabs::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.tab {
    flex: 0 1 auto;
    min-width: 100px;
    background: none;
    border: none;
    padding: 1rem 0.875rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    white-space: nowrap;
}

.tab:hover {
    color: var(--text);
    background-color: var(--stat-bg);
}

.tab.active {
    color: var(--accent);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--accent);
}

.tab-badge {
    background-color: var(--accent);
    color: var(--bg);
    border-radius: 10px;
    padding: 0.15rem 0.4rem;
    font-size: 0.65rem;
    font-weight: 700;
    min-width: 18px;
    text-align: center;
    line-height: 1.2;
}

.tab-content {
    flex: 1;
    overflow-y: auto;
    height: 100%;
}

.tab-pane {
    display: none;
    padding: 2rem;
    background-color: var(--bg);
    height: 100%;
    overflow: hidden;
}

.tab-pane.preview-pane {
    display: flex;
    flex-direction: column;
    padding: 0;
}

.tab-pane.active:not(.preview-pane) {
    animation: fadeIn 0.2s ease;
    display: block;
}

.tab-pane.active.preview-pane {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}


.tab-placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 4rem 2rem;
    font-size: 0.875rem;
    line-height: 1.6;
}

.segments-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.segment-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.segment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.segment-number {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: -0.01em;
    text-transform: uppercase;
}

.segment-length {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
}

.segment-text {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text);
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
    padding-left: 0.5rem;
    border-left: 2px solid var(--border);
}

.preview-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.phone-preview {
    width: 320px;
    max-width: calc(100% - 3rem);
    aspect-ratio: 9 / 18;
    max-height: 100%;
    height: auto;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: 40px;
    padding: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), inset 0 0 0 2px rgba(255, 255, 255, 0.1);
    position: relative;
    flex-shrink: 1;
    min-width: 0;
}

@media (max-height: 700px) {
    .phone-preview {
        width: min(280px, calc(100% - 2rem));
        border-radius: 32px;
    }
    
    .phone-header {
        border-radius: 24px 24px 0 0;
        height: 24px;
    }
    
    .phone-content {
        border-radius: 0 0 24px 24px;
        padding: 0.875rem 0.875rem 1.25rem;
    }
}


.phone-header {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: 32px 32px 0 0;
    padding: 0;
    position: relative;
    height: 28px;
    flex-shrink: 0;
}

.phone-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 24px;
    background: #000;
    border-radius: 0 0 16px 16px;
}

.phone-content {
    background: linear-gradient(180deg, #e5e5ea 0%, #d1d1d6 100%);
    height: calc(100% - 28px);
    border-radius: 0 0 32px 32px;
    padding: 0;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0;
}

.phone-messages {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1rem 1rem 1.5rem;
}

.message-bubble {
    flex-shrink: 0;
}

[data-theme="dark"] .phone-content {
    background: linear-gradient(180deg, #000000 0%, #1a1a1a 100%);
}

.message-bubble {
    background: linear-gradient(135deg, #007AFF 0%, #0051D5 100%);
    border-radius: 18px 18px 4px 18px;
    padding: 0.625rem 0.875rem;
    max-width: 85%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    align-self: flex-end;
    margin-bottom: 0.5rem;
    word-wrap: break-word;
}

.message-text {
    font-size: 0.9375rem;
    line-height: 1.4;
    color: #ffffff;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
    margin-bottom: 0.125rem;
}

.message-time {
    font-size: 0.625rem;
    color: rgba(255, 255, 255, 0.65);
    text-align: right;
    margin-top: 0.125rem;
    font-weight: 400;
}

[data-theme="light"] .phone-preview {
    background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
}

[data-theme="light"] .phone-header {
    background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
}

.phone-content::-webkit-scrollbar {
    width: 4px;
}

.phone-content::-webkit-scrollbar-track {
    background: transparent;
}

.phone-content::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2px;
}

[data-theme="dark"] .phone-content::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

.warnings-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5rem 2rem;
    text-align: center;
}

.empty-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--stat-bg), var(--card-bg));
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-weight: 300;
    transition: all 0.2s ease;
}

.empty-state:hover .empty-icon {
    border-color: var(--accent);
    transform: scale(1.05);
}

.empty-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.empty-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.warning-card {
    background-color: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-left: 3px solid var(--warning-border);
    border-radius: 6px;
    padding: 1.25rem;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
}

.warning-card:hover {
    transform: translateX(2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-left-width: 4px;
    background-color: var(--card-bg);
}

.warning-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.warning-icon {
    font-size: 1.125rem;
    flex-shrink: 0;
}

.warning-title {
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--warning-text);
}

.warning-description {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--warning-text);
    opacity: 0.85;
    margin-bottom: 1rem;
}

.warning-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    margin-top: 0.5rem;
}

.warning-example {
    background-color: var(--card-bg);
    border: 1px solid var(--warning-border);
    border-radius: 4px;
    padding: 0.375rem 0.625rem;
    font-size: 0.8125rem;
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    color: var(--warning-text);
    opacity: 0.8;
    transition: all 0.2s ease;
    display: inline-block;
}

.warning-example:hover {
    opacity: 1;
    border-color: var(--accent);
}

.warning-example-formatted {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: none;
    padding: 0;
}

.warning-punct {
    background-color: var(--card-bg);
    border: 1px solid var(--warning-border);
    border-radius: 4px;
    padding: 0.375rem 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--warning-text);
    min-width: 2rem;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.warning-example-formatted:hover .warning-punct {
    border-color: var(--accent);
    background-color: var(--stat-bg);
}

.warning-count {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: -0.01em;
}

.tab-content::-webkit-scrollbar,
.warnings-container::-webkit-scrollbar {
    width: 8px;
}

.tab-content::-webkit-scrollbar-track,
.warnings-container::-webkit-scrollbar-track {
    background: var(--bg);
    border-radius: 4px;
}

.tab-content::-webkit-scrollbar-thumb,
.warnings-container::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.tab-content::-webkit-scrollbar-thumb:hover,
.warnings-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.footer {
    text-align: center;
    padding: 1.5rem 2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    background-color: var(--bg);
}

.left-panel::-webkit-scrollbar,
.tab-content::-webkit-scrollbar {
    width: 8px;
}

.left-panel::-webkit-scrollbar-track,
.tab-content::-webkit-scrollbar-track {
    background: transparent;
}

.left-panel::-webkit-scrollbar-thumb,
.tab-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.left-panel::-webkit-scrollbar-thumb:hover,
.tab-content::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 1fr;
        height: auto;
        min-height: auto;
    }

    .left-panel {
        border-right: none;
        border-bottom: 1px solid var(--border);
        max-height: 60vh;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .right-panel {
        height: auto;
        min-height: 400px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .main-content {
        padding: 1.5rem 1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .tabs {
        overflow-x: auto;
    }

    .tab {
        min-width: 80px;
        font-size: 0.75rem;
        padding: 0.75rem 0.5rem;
    }
}