/**
 * ===========================================
 * EverMoment - Material Design 3 Styles
 * Paleta: Azul Añil, Naranja Atardecer, Blanco Arena
 * ===========================================
 */

/* ===========================================
   CSS Custom Properties (Design Tokens)
   =========================================== */
:root {
    /* Primary Colors */
    --azul-anil: #003366;
    --azul-anil-light: #1a4d80;
    --azul-anil-dark: #00264d;

    /* Accent Colors */
    --naranja-atardecer: #FF8C42;
    --naranja-light: #FFA366;
    --naranja-dark: #E67632;

    /* Neutral Colors */
    --blanco-arena: #F5F5F5;
    --white: #FFFFFF;
    --gray-100: #E8E8E8;
    --gray-200: #D0D0D0;
    --gray-600: #666666;
    --gray-900: #1C1C1C;

    /* Elevation (Shadows) */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15), 0 4px 10px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Canvas */
    --canvas-width: 1080px;
    --canvas-height: 1350px;
}

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

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    font-family: 'Montserrat', sans-serif;
    background: linear-gradient(135deg, var(--blanco-arena) 0%, #E8E0D8 100%);
    color: var(--gray-900);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* ===========================================
   Header
   =========================================== */
.header {
    background: linear-gradient(135deg, var(--azul-anil) 0%, var(--azul-anil-light) 100%);
    color: var(--white);
    padding: 1rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.tagline {
    font-size: 0.75rem;
    opacity: 0.9;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-top: 0.25rem;
}

/* ===========================================
   Main Container
   =========================================== */
.main-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 1rem;
    padding-bottom: 2rem;
}

/* ===========================================
   Upload Section
   =========================================== */
.upload-section {
    margin-bottom: 1rem;
}

.upload-section.hidden {
    display: none;
}

.upload-area {
    background: var(--white);
    border: 3px dashed var(--azul-anil);
    border-radius: var(--radius-lg);
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 51, 102, 0.03) 0%, rgba(255, 140, 66, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.upload-area:hover::before,
.upload-area.drag-over::before {
    opacity: 1;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--naranja-atardecer);
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.upload-area.drag-over {
    border-style: solid;
}

.upload-icon {
    font-size: 3.5rem;
    color: var(--azul-anil);
    opacity: 0.7;
    margin-bottom: 1rem;
}

.upload-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--azul-anil);
    margin-bottom: 0.5rem;
}

.upload-subtitle {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--naranja-atardecer);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1rem;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.upload-btn:hover {
    background: var(--naranja-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

#file-input {
    display: none;
}

/* ===========================================
   Processing Overlay
   =========================================== */
.processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 51, 102, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.processing-overlay.active {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--naranja-atardecer);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1.5rem;
}

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

.processing-text {
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 500;
    text-align: center;
}

.processing-subtext {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

/* ===========================================
   Editor Section
   =========================================== */
.editor-section {
    display: none;
}

.editor-section.active {
    display: block;
    animation: fadeIn 0.5s ease-out;
}

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

/* ===========================================
   Background Type Toggle
   =========================================== */
.section-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.bg-type-toggle {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    background: var(--gray-100);
    padding: 4px;
    border-radius: var(--radius-full);
}

.toggle-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 0.75rem;
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-fast);
}

.toggle-btn .material-icons-round {
    font-size: 1.1rem;
}

.toggle-btn:hover {
    color: var(--azul-anil);
}

.toggle-btn.active {
    background: var(--white);
    color: var(--azul-anil);
    box-shadow: var(--shadow-sm);
}

.bg-section {
    margin-bottom: 0.5rem;
}

.bg-section.hidden {
    display: none;
}

/* Custom Background Upload */
.custom-bg-upload {
    background: var(--white);
    border: 2px dashed var(--gray-200);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-align: center;
    transition: var(--transition-fast);
}

.custom-bg-upload:hover {
    border-color: var(--azul-anil);
}

.custom-bg-upload.has-image {
    border-style: solid;
    border-color: var(--naranja-atardecer);
}

.custom-bg-preview {
    aspect-ratio: 16 / 9;
    max-height: 120px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
    overflow: hidden;
    color: var(--gray-600);
}

.custom-bg-preview .material-icons-round {
    font-size: 2rem;
    opacity: 0.5;
}

.custom-bg-preview p {
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.custom-bg-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-bg-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--azul-anil);
    color: var(--white);
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.upload-bg-btn:hover {
    background: var(--azul-anil-light);
    transform: translateY(-1px);
}

#upload-bg {
    display: none;
}

/* ===========================================
   Background Selector (Carousel)
   =========================================== */

.backgrounds-carousel-wrapper {
    position: relative;
    margin-bottom: 1rem;
}

.backgrounds-carousel {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 0.5rem 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.backgrounds-carousel::-webkit-scrollbar {
    display: none;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--gray-100);
    color: var(--azul-anil);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
}

.carousel-btn:hover {
    background: var(--azul-anil);
    color: var(--white);
    border-color: var(--azul-anil);
}

.carousel-prev {
    left: -8px;
}

.carousel-next {
    right: -8px;
}

.bg-option {
    flex: 0 0 100px;
    aspect-ratio: 4 / 5;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 3px solid transparent;
    transition: var(--transition-fast);
    position: relative;
    box-shadow: var(--shadow-sm);
    scroll-snap-align: start;
}

.bg-option img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.bg-option:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.bg-option.selected {
    border-color: var(--naranja-atardecer);
    box-shadow: 0 0 0 3px rgba(255, 140, 66, 0.3);
}

.bg-option::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, transparent 50%);
}

.bg-option .bg-name {
    position: absolute;
    bottom: 6px;
    left: 6px;
    right: 6px;
    color: var(--white);
    font-size: 0.65rem;
    font-weight: 600;
    z-index: 1;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bg-option.selected::before {
    content: '✓';
    position: absolute;
    top: 6px;
    right: 6px;
    width: 20px;
    height: 20px;
    background: var(--naranja-atardecer);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: bold;
    z-index: 2;
    box-shadow: var(--shadow-sm);
}

/* ===========================================
   Canvas Container
   =========================================== */
.canvas-wrapper {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 0.75rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 1rem;
}

.canvas-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 5;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--azul-anil-dark);
    touch-action: none;
}

#main-canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: grab;
}

#main-canvas:active {
    cursor: grabbing;
}

.canvas-hint {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.75);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    pointer-events: none;
    animation: pulse 2s ease-in-out infinite;
    backdrop-filter: blur(10px);
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.7;
    }
    50% {
        opacity: 1;
    }
}

.canvas-hint.hidden {
    display: none;
}

/* Canvas Lock Button */
.canvas-lock-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    backdrop-filter: blur(8px);
    transition: var(--transition-fast);
}

.canvas-lock-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    border-color: var(--white);
}

.canvas-lock-btn.locked {
    background: var(--naranja-atardecer);
    border-color: var(--naranja-atardecer);
}

.canvas-container.locked {
    cursor: default;
    touch-action: pan-y;  /* Allow vertical scrolling when locked */
}

.canvas-container.locked #main-canvas {
    cursor: default;
    pointer-events: none;
}

/* ===========================================
   Controls Panel
   =========================================== */
.controls-panel {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-lg);
}

.control-group {
    margin-bottom: 1.25rem;
}

.control-group:last-of-type {
    margin-bottom: 1rem;
}

.control-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.control-label .material-icons-round {
    font-size: 1.25rem;
    color: var(--azul-anil);
}

/* Range Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 6px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--naranja-atardecer), var(--naranja-dark));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: var(--shadow-md);
}

input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--naranja-atardecer), var(--naranja-dark));
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.slider-value {
    min-width: 45px;
    text-align: right;
    font-weight: 600;
    color: var(--azul-anil);
    font-size: 0.9rem;
}

/* Image Adjustments Grid */
.adjustments-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.adjustment-item {
    display: grid;
    grid-template-columns: 80px 1fr 50px;
    align-items: center;
    gap: 0.75rem;
}

.adjustment-label {
    font-size: 0.8rem;
    color: var(--gray-600);
    font-weight: 500;
}

.adjustment-value {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--azul-anil);
    text-align: right;
}

.adjustment-item input[type="range"] {
    height: 4px;
}

/* Text Input */
.text-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
    outline: none;
}

.text-input:focus {
    border-color: var(--azul-anil);
    box-shadow: 0 0 0 4px rgba(0, 51, 102, 0.1);
}

.text-input::placeholder {
    color: var(--gray-200);
}

/* ===========================================
   Buttons
   =========================================== */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--naranja-atardecer), var(--naranja-dark));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: var(--white);
    color: var(--azul-anil);
    border: 2px solid var(--azul-anil);
}

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

/* ===========================================
   Toast Notification
   =========================================== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--azul-anil);
    color: var(--white);
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-xl);
    z-index: 1001;
    opacity: 0;
    transition: var(--transition-normal);
    max-width: 90%;
    text-align: center;
}

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

.toast.success {
    background: #28A745;
}

.toast.error {
    background: #DC3545;
}

.toast-message {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--gray-600);
    font-size: 0.75rem;
}

.footer a {
    color: var(--azul-anil);
    text-decoration: none;
}

/* ===========================================
   Control Divider
   =========================================== */
.control-divider {
    height: 1px;
    background: var(--gray-100);
    margin: 1rem 0;
}

/* ===========================================
   Text Section (Header/Footer controls)
   =========================================== */
.text-section {
    margin-bottom: 0.5rem;
}

.section-subtitle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--azul-anil);
    margin-bottom: 0.75rem;
}

.section-subtitle .material-icons-round {
    font-size: 1.1rem;
}

.text-section .control-group {
    margin-bottom: 0.75rem;
}

/* ===========================================
   Style Controls (Font, Size, Color)
   =========================================== */
.style-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.style-control {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.style-control:last-child {
    grid-column: 1 / -1;
}

.style-control label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Select Dropdown */
.style-select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    background: var(--white);
    color: var(--gray-900);
    cursor: pointer;
    transition: var(--transition-fast);
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.style-select:focus {
    border-color: var(--azul-anil);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

.style-select:hover {
    border-color: var(--gray-200);
}

/* Size Number Input */
.size-input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    background: var(--white);
    color: var(--gray-900);
    transition: var(--transition-fast);
    outline: none;
    text-align: center;
}

.size-input:focus {
    border-color: var(--azul-anil);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.1);
}

.size-input::-webkit-inner-spin-button,
.size-input::-webkit-outer-spin-button {
    opacity: 1;
}

/* ===========================================
   Color Picker
   =========================================== */
.color-picker {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.color-option:hover {
    transform: scale(1.15);
}

.color-option.selected {
    border-color: var(--azul-anil);
    box-shadow: 0 0 0 2px var(--white), 0 0 0 4px var(--azul-anil);
}

.color-option.selected::after {
    content: '✓';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
    color: var(--white);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Special handling for light colors */
.color-option[data-color="#FFFFFF"]::after,
.color-option[data-color="#FFD700"]::after {
    color: var(--gray-900);
    text-shadow: none;
}

.color-option[data-color="#FFFFFF"] {
    border: 2px solid var(--gray-200);
}

/* ===========================================
   Responsive Design
   =========================================== */
@media (min-width: 480px) {
    .main-container {
        padding: 1.5rem;
    }

    .upload-area {
        padding: 3rem 2rem;
    }

    .canvas-wrapper {
        padding: 1rem;
    }

    .controls-panel {
        padding: 1.5rem;
    }

    .style-controls {
        grid-template-columns: 1fr 1fr 1fr;
    }

    .style-control:last-child {
        grid-column: auto;
    }

    .color-option {
        width: 36px;
        height: 36px;
    }
}