/*
 * ====================================================================
 * Affirmation Card Generator Stylesheet
 * Author: Gemini
 * No frameworks, just modern CSS.
 * ====================================================================
 */

/* ---------------------------------- */
/* 1. ROOT & THEME           */
/* ---------------------------------- */
:root {
    /* Base font settings */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-serif: "Georgia", "Times New Roman", serif;
    --font-mono: "Menlo", "Consolas", monospace;

    /* Spacing rhythm unit */
    --space-unit: 0.5rem; /* 8px at 16px root */

    /* Border radius */
    --radius-sm: calc(var(--space-unit) * 0.5); /* 4px */
    --radius-md: var(--space-unit); /* 8px */
    --radius-lg: calc(var(--space-unit) * 2); /* 16px */

    /* Transitions */
    --transition-speed: 200ms;
    --transition-curve: ease-in-out;

    /* Decorative corner SVGs (inline for portability) */
    --corner-svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M100 0 C50 5, 5 50, 0 100 L0 80 C15 50, 50 15, 80 0 Z' fill='%23000000'/%3E%3C/svg%3E");
    --corner-svg-2: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M0 0 C30 10, 60 40, 100 100 L80 100 C50 60, 20 30, 0 20 Z' fill='%23000000'/%3E%3C/svg%3E");
    
    /* Light Theme (Default) */
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --border-color: #cbd5e0;
    --accent-color: #4299e1;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.8);
}

body.dark-theme {
    /* Dark Theme */
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --text-primary: #edf2f7;
    --text-secondary: #a0aec0;
    --border-color: #4a5568;
    --accent-color: #63b3ed;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --glass-bg: rgba(45, 55, 72, 0.7);
    --glass-border: rgba(74, 85, 104, 0.8);
}

/* ---------------------------------- */
/* 2. BASE & LAYOUT          */
/* ---------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed) var(--transition-curve), color var(--transition-speed) var(--transition-curve);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ---------------------------------- */
/* 3. SIDEBAR & CONTROLS       */
/* ---------------------------------- */
.sidebar {
    width: 360px;
    flex-shrink: 0;
    padding: calc(var(--space-unit) * 3);
    display: flex;
    flex-direction: column;
    gap: calc(var(--space-unit) * 3);
    overflow-y: auto;
    background: var(--glass-bg);
    border-right: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background-color var(--transition-speed) var(--transition-curve), border-color var(--transition-speed) var(--transition-curve);
}

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

.sidebar-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

.header-controls {
    display: flex;
    gap: var(--space-unit);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: calc(var(--space-unit) * 1.5);
}

.control-group > label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Input styles */
input[type="number"],
input[type="text"],
select {
    width: 100%;
    padding: var(--space-unit) calc(var(--space-unit) * 1.5);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-speed) var(--transition-curve);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(var(--accent-color), 0.2);
}

/* Buttons */
.icon-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-curve);
}

.icon-button:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-color);
}

.icon-button .icon {
    width: 20px;
    height: 20px;
}

/* Theme Toggle Specific */
#theme-toggle .icon-moon { display: none; }
#theme-toggle .icon-sun { display: block; }
body.dark-theme #theme-toggle .icon-moon { display: block; }
body.dark-theme #theme-toggle .icon-sun { display: none; }


/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: calc(var(--space-unit) * 4);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-curve);
    background-color: var(--bg-secondary);
}
.upload-zone.dragover {
    border-color: var(--accent-color);
    background-color: var(--bg-tertiary);
}
.upload-zone .icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: var(--space-unit);
}
.upload-zone p {
    color: var(--text-secondary);
    line-height: 1.5;
}
.upload-zone .file-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: var(--space-unit);
    word-break: break-all;
}

/* Segmented Control */
.segmented-control {
    display: flex;
    width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
}
.segmented-control input[type="radio"] {
    display: none;
}
.segmented-control label {
    flex: 1;
    text-align: center;
    padding: var(--space-unit) 0;
    cursor: pointer;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all var(--transition-speed) var(--transition-curve);
}
.segmented-control input[type="radio"]:checked + label {
    background-color: var(--accent-color);
    color: white;
    font-weight: 600;
}
.segmented-control label:not(:last-of-type) {
    border-right: 1px solid var(--border-color);
}

/* Custom Size Inputs */
.custom-size-inputs {
    display: flex;
    gap: var(--space-unit);
    align-items: center;
}
.custom-size-inputs.hidden {
    display: none;
}
.custom-size-inputs input { width: 40%; }
.custom-size-inputs select { width: 20%; }

/* Grid Controls */
.grid-controls { display: flex; gap: calc(var(--space-unit) * 2); }
.grid-controls > div { flex: 1; display: flex; flex-direction: column; gap: var(--space-unit); }
.grid-controls > div label { font-size: 0.8rem; color: var(--text-secondary); }

/* Sliders */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    outline: none;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 3px solid var(--bg-secondary);
    box-shadow: 0 0 2px rgba(0,0,0,0.2);
    transition: transform var(--transition-speed) var(--transition-curve);
}
input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent-color);
    border-radius: 50%;
    border: 3px solid var(--bg-secondary);
    box-shadow: 0 0 2px rgba(0,0,0,0.2);
    transition: transform var(--transition-speed) var(--transition-curve);
}
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.2); }
input[type="range"]:active::-moz-range-thumb { transform: scale(1.2); }


/* Toggle Switch */
.toggle-control { display: flex; justify-content: space-between; align-items: center;}
.switch { position: relative; display: inline-block; width: 50px; height: 28px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--bg-tertiary); transition: var(--transition-speed); border-radius: 28px; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 4px; bottom: 4px; background-color: white; transition: var(--transition-speed); border-radius: 50%; }
input:checked + .slider { background-color: var(--accent-color); }
input:checked + .slider:before { transform: translateX(22px); }

/* Color Pickers */
.color-picker-group { display: flex; justify-content: space-around; align-items: center; }
.color-picker-group label { font-size: 0.9rem; color: var(--text-secondary); }
input[type="color"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 40px;
    height: 40px;
    background-color: transparent;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    overflow: hidden;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: 2px solid var(--border-color); border-radius: 50%; }
input[type="color"]::-moz-color-swatch { border: 2px solid var(--border-color); border-radius: 50%; }


/* ---------------------------------- */
/* 4. PREVIEW AREA           */
/* ---------------------------------- */
.preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: calc(var(--space-unit) * 4);
    overflow: hidden;
}

.preview-container {
    flex: 1;
    display: grid;
    place-items: center;
    overflow: auto;
    padding: var(--space-unit);
}

.page-preview {
    background-color: var(--bg-secondary);
    box-shadow: 0 10px 30px -15px var(--shadow-color);
    transition: all var(--transition-speed) var(--transition-curve);
    display: grid;
    /* Grid rows/cols, gap, and padding will be set by JS */
    transform-origin: top center;
}

.card {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-unit);
    overflow: hidden;
    position: relative;
    /* All styling (font, border, etc) is applied via custom properties from JS */
    font-family: var(--card-font-family);
    font-size: var(--card-font-size);
    background-color: var(--card-bg-color);
    border: var(--card-border-width) solid var(--card-border-color);
    color: var(--text-primary);
    transition: all var(--transition-speed) var(--transition-curve);
}

/* Decorative Corners */
.card.has-corners::before,
.card.has-corners::after {
    content: '';
    position: absolute;
    width: 25%;
    height: 25%;
    background-color: var(--card-border-color);
    transition: background-color var(--transition-speed) var(--transition-curve);
}

.card.has-corners::before {
    top: 0;
    left: 0;
    -webkit-mask-image: var(--corner-svg);
    mask-image: var(--corner-svg);
}

.card.has-corners::after {
    bottom: 0;
    right: 0;
    transform: rotate(180deg);
    -webkit-mask-image: var(--corner-svg);
    mask-image: var(--corner-svg);
}

/* ---------------------------------- */
/* 5. PAGINATION & THUMBS      */
/* ---------------------------------- */
.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(var(--space-unit) * 4);
    padding: calc(var(--space-unit) * 2) 0;
    flex-shrink: 0;
}
.pagination-controls button {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition-speed) var(--transition-curve);
}
.pagination-controls button:hover:not(:disabled) {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}
.pagination-controls button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.thumbnail-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-unit);
    padding: var(--space-unit);
    flex-shrink: 0;
    overflow-x: auto;
}
.thumbnail {
    width: 60px;
    height: 80px;
    border: 2px solid var(--border-color);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-weight: 600;
    transition: all var(--transition-speed) var(--transition-curve);
}
.thumbnail:hover {
    border-color: var(--accent-color);
}
.thumbnail.active {
    border-color: var(--accent-color);
    background-color: var(--accent-color);
    color: white;
}


/* ---------------------------------- */
/* 6. PRINT STYLES           */
/* ---------------------------------- */
@media print {
    /* Hide UI elements */
    .sidebar, .pagination-controls, .thumbnail-bar {
        display: none !important;
    }

    /* Reset body and layout for printing */
    body, .app-container, .preview-area, .preview-container {
        display: block;
        width: auto;
        height: auto;
        overflow: visible;
        padding: 0;
        margin: 0;
        background: none;
    }

    .page-preview {
        box-shadow: none;
        margin: 0;
        page-break-after: always; /* Each page-preview is a new print page */
        transform: scale(1) !important; /* Ensure it's not scaled down */
        border: none;
    }
    
    .page-preview:last-of-type {
        page-break-after: auto;
    }

    .card {
        -webkit-print-color-adjust: exact; /* Force colors and backgrounds to print */
        print-color-adjust: exact;
    }
}

/* ---------------------------------- */
/* 7. RESPONSIVE DESIGN        */
/* ---------------------------------- */
@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
        height: auto;
    }
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--glass-border);
        max-height: 50vh; /* Make sidebar scrollable if it gets too tall */
    }
    .preview-area {
        height: 100%; /* Take remaining space */
    }
}

@media (max-width: 768px) {
    .sidebar {
        padding: calc(var(--space-unit) * 2);
    }
    .preview-area {
        padding: calc(var(--space-unit) * 2);
    }
    .sidebar-header h1 {
        font-size: 1.5rem;
    }
}