/* Amazing Counter App Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Light Theme */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --danger-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --info-gradient: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    
    /* Neutral Colors - Light Theme */
    --white: #ffffff;
    --black: #1a1a1a;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-700: #495057;
    --gray-800: #343a40;
    --card-bg: #ffffff;
    --text-primary: #343a40;
    --text-secondary: #495057;
    --input-bg: #f8f9fa;
    --input-border: #dee2e6;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    /* Transitions & Effects */
    --transition-fast: 0.2s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --primary-gradient: linear-gradient(135deg, #4c63d2 0%, #5a67d8 100%);
    --secondary-gradient: linear-gradient(135deg, #ed64a6 0%, #f093fb 100%);
    --success-gradient: linear-gradient(135deg, #38b2ac 0%, #4fd1c7 100%);
    --danger-gradient: linear-gradient(135deg, #fc8181 0%, #feb2b2 100%);
    --warning-gradient: linear-gradient(135deg, #f6ad55 0%, #fbd38d 100%);
    --info-gradient: linear-gradient(135deg, #63b3ed 0%, #90cdf4 100%);
    
    --white: #1a202c;
    --black: #ffffff;
    --gray-100: #2d3748;
    --gray-200: #4a5568;
    --gray-300: #718096;
    --gray-700: #e2e8f0;
    --gray-800: #f7fafc;
    --card-bg: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --input-bg: #4a5568;
    --input-border: #718096;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    overflow: hidden;
    position: relative;
}

/* Animated Background */
.background-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    z-index: -1;
}

.background-animation::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(255, 255, 255, 0.03) 20px,
        rgba(255, 255, 255, 0.03) 40px
    );
}

@keyframes backgroundMove {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Container */
.container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

/* Counter Card */
.counter-card {
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: var(--radius-xl);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    min-width: 350px;
    transform: translateY(0);
    transition: all var(--transition-normal);
}

.counter-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transition: left var(--transition-slow);
}

.counter-card:hover::before {
    left: 100%;
}

.counter-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

/* Title */
.title {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    position: relative;
}

.title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--secondary-gradient);
    border-radius: 2px;
}

/* Counter Wrapper */
.counter-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

/* Counter Display */
.counter-display {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    box-shadow: inset var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.counter-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--success-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.counter-display:hover::before {
    transform: scaleX(1);
}

.counter-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1;
    position: relative;
    z-index: 2;
    transition: all var(--transition-fast);
}

.counter-number.animate {
    transform: scale(1.2);
    color: #667eea;
}

/* Counter Buttons */
.counter-btn {
    width: 70px;
    height: 70px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 2rem;
    font-weight: 600;
    color: var(--white);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    z-index: 10;
    user-select: none;
}

.counter-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-fast);
}

.counter-btn:active::before {
    width: 100px;
    height: 100px;
}

.decrease-btn {
    background: var(--danger-gradient);
}

.decrease-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 30px rgba(250, 112, 154, 0.4);
}

.decrease-btn:active {
    transform: translateY(-1px) scale(0.98);
}

.increase-btn {
    background: var(--success-gradient);
}

.increase-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 30px rgba(79, 172, 254, 0.4);
}

.increase-btn:active {
    transform: translateY(-1px) scale(0.98);
}

.btn-symbol {
    font-size: 2.5rem;
    line-height: 1;
    position: relative;
    z-index: 2;
    transition: transform var(--transition-fast);
    pointer-events: none;
}

.counter-btn:hover .btn-symbol {
    transform: scale(1.1);
}

/* Counter Info */
.counter-info {
    margin-top: 1rem;
}

.counter-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.saved-indicator {
    margin-top: 0.5rem;
}

.saved-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--card-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-normal);
    z-index: 1000;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.theme-icon {
    transition: transform var(--transition-normal);
}

/* Input Section */
.input-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--input-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--input-border);
}

.input-wrapper {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.custom-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--input-border);
    border-radius: var(--radius-md);
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-normal);
    outline: none;
}

.custom-input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.custom-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.action-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-width: 100px;
    color: var(--white);
    font-family: inherit;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-fast);
}

.action-btn:active::before {
    width: 200px;
    height: 200px;
}

.save-btn {
    background: var(--success-gradient);
}

.save-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 172, 254, 0.3);
}

.reset-btn {
    background: var(--warning-gradient);
    color: rgb(78, 77, 77);
}

.reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(246, 173, 85, 0.3);
}

.delete-btn {
    background: var(--danger-gradient);
}

.delete-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(250, 112, 154, 0.3);
}

.add-btn {
    background: var(--info-gradient);
    padding: 1rem 2rem;
    font-weight: 600;
    min-width: auto;
    color: rgb(78, 77, 77);
}

.add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 179, 237, 0.3);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card-bg);
    color: var(--text-primary);
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--input-border);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
    max-width: 90vw;
    text-align: center;
}

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

.toast-message {
    font-weight: 500;
    font-size: 0.95rem;
}

/* Responsive Design - Enhanced for All Devices */

/* Extra Small Devices (phones, 320px and up) */
@media (max-width: 375px) {
    .theme-toggle {
        top: 15px;
        right: 15px;
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .container {
        padding: 8px;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .counter-card {
        min-width: 280px;
        max-width: 300px;
        padding: 1.5rem 1rem;
        margin: 10px;
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    }
    
    .title {
        font-size: 1.6rem;
        margin-bottom: 1.2rem;
        line-height: 1.2;
    }
    
    .counter-wrapper {
        gap: 0.8rem;
        margin-bottom: 1.5rem;
        flex-direction: row;
        align-items: center;
    }
    
    .counter-btn {
        width: 55px;
        height: 55px;
        font-size: 1.6rem;
    }
    
    .counter-number {
        font-size: 2.2rem;
    }
    
    .input-section {
        padding: 1rem;
        margin: 1.5rem 0;
    }
    
    .input-wrapper {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .custom-input {
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }
    
    .action-buttons {
        gap: 0.5rem;
        margin-top: 1.5rem;
    }
    
    .action-btn {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
        min-width: 80px;
    }
}

/* Small Devices (landscape phones, 576px and up) */
@media (min-width: 376px) and (max-width: 575px) {
    .counter-card {
        min-width: 320px;
        max-width: 350px;
        padding: 2rem 1.5rem;
    }
    
    .title {
        font-size: 1.9rem;
        margin-bottom: 1.5rem;
    }
    
    .counter-wrapper {
        gap: 1.2rem;
        margin-bottom: 1.8rem;
    }
    
    .counter-btn {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .counter-number {
        font-size: 2.8rem;
    }
    
    .input-wrapper {
        flex-direction: column;
        gap: 1rem;
    }
    
    .action-buttons {
        gap: 0.8rem;
    }
}

/* Medium Devices (tablets, 768px and up) */
@media (min-width: 576px) and (max-width: 767px) {
    .counter-card {
        min-width: 350px;
        max-width: 450px;
        padding: 2.5rem 2rem;
    }
    
    .title {
        font-size: 2.2rem;
        margin-bottom: 1.8rem;
    }
    
    .counter-wrapper {
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .counter-btn {
        width: 65px;
        height: 65px;
        font-size: 1.9rem;
    }
    
    .counter-number {
        font-size: 3.2rem;
    }
    
    .input-wrapper {
        flex-direction: row;
        gap: 1rem;
    }
    
    .action-buttons {
        gap: 1rem;
    }
}

/* Large Devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991px) {
    .counter-card {
        padding: 2.5rem 2rem;
        min-width: 380px;
        max-width: 450px;
    }
    
    .title {
        font-size: 2.3rem;
        margin-bottom: 2rem;
    }
    
    .counter-wrapper {
        gap: 1.8rem;
        margin-bottom: 2rem;
    }
    
    .counter-btn {
        width: 68px;
        height: 68px;
        font-size: 2rem;
    }
    
    .btn-symbol {
        font-size: 2.3rem;
    }
    
    .counter-number {
        font-size: 3.4rem;
    }
}

/* Extra Large Devices (large laptops and desktops, 1200px and up) */
@media (min-width: 992px) and (max-width: 1199px) {
    .counter-card {
        min-width: 420px;
        max-width: 500px;
        padding: 3rem 2.5rem;
    }
    
    .title {
        font-size: 2.6rem;
    }
    
    .counter-number {
        font-size: 3.8rem;
    }
    
    .counter-btn {
        width: 75px;
        height: 75px;
    }
    
    .btn-symbol {
        font-size: 2.6rem;
    }
}

/* Extra Extra Large Devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .counter-card {
        min-width: 450px;
        max-width: 550px;
        padding: 3.5rem 3rem;
    }
    
    .title {
        font-size: 2.8rem;
    }
    
    .counter-number {
        font-size: 4rem;
    }
    
    .counter-btn {
        width: 80px;
        height: 80px;
    }
    
    .btn-symbol {
        font-size: 2.8rem;
    }
}

/* Landscape Orientation Optimizations */
@media (orientation: landscape) and (max-height: 600px) {
    .container {
        padding: 15px;
    }
    
    .counter-card {
        padding: 1.5rem 2rem;
        max-height: 90vh;
        overflow: hidden;
    }
    
    .title {
        font-size: 1.8rem;
        margin-bottom: 1rem;
    }
    
    .counter-wrapper {
        gap: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .counter-btn {
        width: 60px;
        height: 60px;
    }
    
    .counter-number {
        font-size: 2.5rem;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .counter-card {
        border: 0.5px solid rgba(255, 255, 255, 0.3);
    }
    
    .counter-btn {
        border: 0.5px solid rgba(255, 255, 255, 0.1);
    }
}

/* Touch Device Optimizations */
@media (pointer: coarse) {
    .counter-btn {
        min-height: 48px;
        min-width: 48px;
        padding: 8px;
    }
    
    .counter-btn:hover {
        transform: translateY(-2px) scale(1.03);
    }
}

/* Fine Pointer Devices (Mouse/Trackpad) */
@media (pointer: fine) {
    .counter-btn:hover {
        transform: translateY(-3px) scale(1.05);
    }
    
    .counter-card:hover {
        transform: translateY(-8px);
    }
}

/* Device-Specific Fixes */

/* iPhone SE and similar small screens */
@media (max-width: 320px) {
    .counter-card {
        min-width: 260px;
        padding: 1.2rem 0.8rem;
        margin: 5px;
    }
    
    .title {
        font-size: 1.4rem;
    }
    
    .counter-number {
        font-size: 2rem;
    }
    
    .counter-btn {
        width: 50px;
        height: 50px;
    }
    
    .btn-symbol {
        font-size: 1.6rem;
    }
}

/* Large phones in landscape */
@media (max-height: 450px) and (orientation: landscape) {
    .counter-wrapper {
        flex-direction: row;
        gap: 2rem;
    }
    
    .counter-card {
        padding: 1rem 2rem;
    }
    
    .title {
        font-size: 1.6rem;
        margin-bottom: 0.8rem;
    }
    
    .counter-info {
        margin-top: 0.5rem;
    }
}

/* Foldable Devices */
@media (min-width: 280px) and (max-width: 653px) and (min-height: 653px) {
    .counter-card {
        min-width: 90%;
        max-width: 400px;
        padding: 2rem;
    }
    
    .counter-wrapper {
        gap: 2rem;
    }
}

/* Ultra-wide screens */
@media (min-width: 1400px) {
    .counter-card {
        min-width: 500px;
        max-width: 600px;
        padding: 4rem 3.5rem;
    }
    
    .title {
        font-size: 3rem;
    }
    
    .counter-number {
        font-size: 4.5rem;
    }
    
    .counter-btn {
        width: 85px;
        height: 85px;
    }
    .btn-symbol {
        font-size: 3rem;
    }
}

/* Animation Classes */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Accessibility */
.counter-btn:focus {
    outline: 3px solid rgba(102, 126, 234, 0.5);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Performance Optimizations for All Devices */
.counter-card,
.counter-btn,
.counter-number {
    will-change: transform;
}

.background-animation {
    will-change: transform;
    backface-visibility: hidden;
}

/* Smooth Scrolling for overflow situations */
html {
    scroll-behavior: smooth;
}

/* Prevent text selection on buttons */
.counter-btn {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Optimize for battery life on mobile */
@media (max-width: 768px) {
    .background-animation::before {
        animation-duration: 30s; /* Slower animation for mobile */
    }
}