/* CSS Custom Properties for theming */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-active: #4338ca;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-success: #10b981;
    --color-text: #1f2937;
    --color-text-secondary: #6b7280;
    --color-text-light: #9ca3af;
    --color-background: #ffffff;
    --color-surface: #f9fafb;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Borders */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;

    /* Touch targets */
    --touch-target-min: 44px;
}

/* Reset and 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);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-background);
    overflow-x: hidden;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Login Section */
.login-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-active) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    background: var(--color-background);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-xl);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.login-header p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Form Elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    font-family: var(--font-family);
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

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

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

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

.btn-primary:active {
    background-color: var(--color-primary-active);
}

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

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

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

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

.btn-text {
    color: var(--color-primary);
    background-color: transparent;
    padding: var(--spacing-sm);
}

.btn-text:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

.btn-icon {
    min-height: var(--touch-target-min);
    width: var(--touch-target-min);
    padding: var(--spacing-sm);
    background-color: transparent;
    color: var(--color-text-secondary);
}

.btn-icon:hover {
    background-color: var(--color-surface);
    color: var(--color-text);
}

.btn-large {
    min-height: 52px;
    font-size: var(--font-size-lg);
}

/* Error Message */
.error-message {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--border-radius-md);
    display: none;
}

.error-message:not(:empty) {
    display: block;
}

/* App Section */
.app-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-surface);
}

/* App Header */
.app-header {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

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

.header-content h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
}

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

.timezone-selector label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.timezone-selector select {
    flex: 1;
    max-width: 250px;
}

/* Event List Container */
.event-list-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    padding-bottom: 180px; /* Space for voice input area */
}

.event-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.event-list-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
}

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

.event-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Event Card */
.event-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.event-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.event-card:active {
    transform: translateY(0);
}

.event-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

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

.event-description {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: 1.6;
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    text-align: center;
}

.loading-state p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-md);
}

.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;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    text-align: center;
}

.empty-state svg {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

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

.empty-state-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* Voice Input Area */
.voice-input-area {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--color-background);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) var(--spacing-lg);
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.mic-button {
    position: relative;
    width: 72px;
    height: 72px;
    border-radius: var(--border-radius-full);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-active) 100%);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}

.mic-button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.mic-button:active {
    transform: scale(0.95);
}

.mic-button.listening {
    background: var(--color-danger);
    animation: pulse 1.5s ease-in-out infinite;
}

.mic-button.processing {
    background: var(--color-text-secondary);
    cursor: wait;
}

.mic-button.processing .mic-icon {
    display: none;
}

.mic-button.processing .mic-spinner {
    display: block;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0.2), var(--shadow-lg);
    }
}

.mic-icon {
    width: 32px;
    height: 32px;
}

.mic-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.voice-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
}

.voice-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-align: center;
    opacity: 0.7;
    margin-top: var(--spacing-xs);
    font-style: italic;
}

.interim-text {
    max-width: 500px;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    text-align: center;
    font-style: italic;
    opacity: 0.8;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn var(--transition-base);
}

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

.modal-content {
    position: relative;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    background-color: var(--color-background);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-base);
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
}

.edit-form {
    padding: var(--spacing-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.form-actions-right {
    display: flex;
    gap: var(--spacing-sm);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* Confirm Dialog */
#confirm-dialog {
    z-index: 1100; /* Above edit modal */
}

.confirm-dialog-content {
    max-width: 400px;
}

.confirm-dialog-body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.confirm-dialog-body p {
    color: var(--color-text);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.confirm-dialog-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* Responsive Design */
@media (min-width: 640px) {
    .event-list-container {
        padding: var(--spacing-xl);
    }

    .voice-input-area {
        padding: var(--spacing-xl);
    }
}

@media (min-width: 768px) {
    .app-header {
        padding: var(--spacing-lg) var(--spacing-xl);
    }

    .timezone-selector {
        gap: var(--spacing-md);
    }

    .event-list {
        max-width: 800px;
        margin: 0 auto;
    }
}

@media (min-width: 1024px) {
    :root {
        font-size: 18px;
    }
}

/* Voice Preview Dialog */
.voice-preview-content {
    max-width: 450px;
}

.voice-preview-body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.voice-preview-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.voice-preview-details {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.voice-preview-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.voice-preview-item-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.voice-preview-item-value {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text);
}

.voice-preview-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    flex-wrap: wrap;
}

/* Safe area insets for devices with notches */
@supports (padding: env(safe-area-inset-bottom)) {
    .voice-input-area {
        padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom));
    }
}