:root {
    /* Color Palette */
    --color-primary: #6C63FF;
    --color-primary-dark: #5650D9;
    --color-primary-light: #8F88FF;
    --color-secondary: #FF6584;
    --color-success: #00D9A3;
    --color-warning: #FFB800;
    --color-danger: #FF4757;

    /* Dark Theme Colors */
    --color-bg-primary: #0F0F1E;
    --color-bg-secondary: #1A1A2E;
    --color-bg-tertiary: #242438;
    --color-bg-card: rgba(255, 255, 255, 0.05);
    --color-bg-hover: rgba(255, 255, 255, 0.08);

    /* Text Colors */
    --color-text-primary: #FFFFFF;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-tertiary: rgba(255, 255, 255, 0.5);

    /* Border & Shadow */
    --color-border: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-medium: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Screen Management */
.screen {
    display: none;
    min-height: 100vh;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.screen.active {
    display: block;
    opacity: 1;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    flex: 1;
    text-align: center;
}

.header-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Cards */
.card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.login-card {
    max-width: 400px;
    margin: 0 auto;
    margin-top: 5vh;
}

/* Logo */
.logo-container {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.logo-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.logo-container h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Forms */
.auth-form h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.hint {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: var(--font-size-md);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.textarea-container {
    position: relative;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    min-height: 44px;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

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

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background: #e63946;
}

.btn-text {
    background: transparent;
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    font-weight: 600;
}

.btn-text:hover {
    background: rgba(108, 99, 255, 0.1);
}

.btn-block {
    width: 100%;
}

.btn-icon,
.btn-icon-small {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.btn-icon-small {
    width: 32px;
    height: 32px;
}

.btn-icon:hover,
.btn-icon-small:hover {
    background: var(--color-bg-hover);
}

.btn-icon svg,
.btn-icon-small svg {
    width: 24px;
    height: 24px;
}

.btn-icon-small svg {
    width: 20px;
    height: 20px;
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 90;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 48px rgba(108, 99, 255, 0.5);
}

.fab:active {
    transform: scale(0.95);
}

.fab svg {
    width: 28px;
    height: 28px;
}

/* Search Bar */
.search-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}

.search-bar input {
    flex: 1;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text-primary);
    font-size: var(--font-size-md);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Protocol List */
.protocol-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.protocol-item {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.protocol-item:hover {
    background: var(--color-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.protocol-item:active {
    transform: translateY(0);
}

.protocol-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xs);
}

.protocol-topic {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.protocol-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

.protocol-participants {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.protocol-participants::before {
    content: '👥';
}

.protocol-preview {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--color-text-tertiary);
}

.empty-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.empty-state h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
}

/* Voice Input */
.btn-voice {
    position: absolute;
    right: var(--spacing-sm);
    bottom: var(--spacing-sm);
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-voice:hover {
    background: var(--color-primary-light);
}

.btn-voice.active {
    background: var(--color-danger);
    animation: pulse 1.5s ease-in-out infinite;
}

.btn-voice svg {
    width: 20px;
    height: 20px;
}

.speech-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--color-danger);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

/* Settings */
.settings-section {
    margin-bottom: var(--spacing-xl);
}

.settings-section h2 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.stat-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.info-text {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.info-text p {
    margin-bottom: var(--spacing-xs);
}

.info-text p:last-child {
    margin-bottom: 0;
}

/* Toast */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(200%);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: transform var(--transition-medium);
    max-width: 90%;
    text-align: center;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Dialogs */
.dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--spacing-md);
}

.dialog {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.dialog h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.dialog p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.dialog-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.dialog-actions .btn {
    flex: 1;
}

/* Error Messages */
.error-message {
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
}

/* Loading Screen */
#loading-screen {
    /* display: flex; removed for mobile compatibility */
    align-items: center;
    justify-content: center;
}

.loading-container {
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .login-card {
        margin-top: 10vh;
        padding: var(--spacing-md);
    }

    .fab {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .login-card {
        margin-top: var(--spacing-md);
        max-width: 600px;
    }
}