/* Mobile-first styles for Meme Generator */

/* CSS Variables */
:root {
    --color-bg: #1a1a2e;
    --color-surface: #16213e;
    --color-surface-hover: #1f2b47;
    --color-primary: #e94560;
    --color-primary-hover: #ff6b81;
    --color-secondary: #0f3460;
    --color-secondary-hover: #154c8a;
    --color-text: #ffffff;
    --color-text-muted: #a0a0a0;
    --color-border: #2a2a4a;

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);

    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Base */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    min-height: 100dvh;
    line-height: 1.5;
    overflow-x: hidden;
}

/* Screens */
.screen {
    display: none;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
}

.screen.active {
    display: flex;
}

/* Header */
.header {
    padding: 16px;
    text-align: center;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.header-editor {
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: left;
}

.template-title {
    font-size: 1.125rem;
    font-weight: 600;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Back Button */
.btn-back {
    display: flex;
    align-items: center;
    gap: 4px;
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 8px;
    margin: -8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.btn-back:hover,
.btn-back:active {
    background: var(--color-surface-hover);
}

/* Grid Container */
.grid-container {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
}

/* Templates Grid */
.templates-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.template-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    border: 2px solid transparent;
}

.template-card:hover,
.template-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.template-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
}

.template-card .template-label {
    padding: 8px;
    font-size: 0.75rem;
    text-align: center;
    color: var(--color-text-muted);
    background: var(--color-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Editor Container */
.editor-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 16px;
    gap: 16px;
    overflow-y: auto;
}

/* Preview Wrapper */
.preview-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 8px;
    min-height: 200px;
}

#meme-canvas {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
}

/* Inputs */
.inputs-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
    -webkit-appearance: none;
}

.input-group input::placeholder {
    color: var(--color-text-muted);
    opacity: 0.6;
}

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

/* Buttons */
.actions-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: auto;
    padding-top: 8px;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    min-height: 52px;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-family);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

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

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

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

.btn-primary:disabled {
    background: var(--color-border);
    cursor: not-allowed;
}

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

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

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-surface);
    color: var(--color-text);
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    z-index: 1000;
    pointer-events: none;
    border: 1px solid var(--color-border);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: #2ecc71;
}

.toast.error {
    border-color: var(--color-primary);
}

/* Loading State */
.template-card.loading img {
    opacity: 0.5;
}

/* Responsive - Tablet and up */
@media (min-width: 480px) {
    .templates-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    #meme-canvas {
        max-height: 400px;
    }
}

@media (min-width: 768px) {
    .grid-container,
    .editor-container {
        max-width: 600px;
        margin: 0 auto;
        padding: 24px;
    }

    .templates-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .header {
        padding: 20px;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .actions-container {
        flex-direction: row;
    }

    .btn {
        flex: 1;
    }

    #meme-canvas {
        max-height: 450px;
    }
}

@media (min-width: 1024px) {
    .grid-container {
        max-width: 800px;
    }

    .templates-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Accessibility - Reduce Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}

/* Safe area for notched devices */
@supports (padding: env(safe-area-inset-bottom)) {
    .actions-container {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .toast {
        bottom: calc(24px + env(safe-area-inset-bottom));
    }
}