/* Rock Paper Scissors - Mobile-First CSS */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Enhanced vibrant palette */
    --color-primary: #7c3aed;
    --color-primary-dark: #6d28d9;
    --color-primary-light: #a78bfa;
    --color-secondary: #ec4899;
    --color-secondary-dark: #db2777;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    /* Game Colors - More vibrant */
    --color-rock: #64748b;
    --color-paper: #fbbf24;
    --color-scissors: #f43f5e;

    /* Neutral Colors - Better contrast */
    --color-bg: #0a0f1e;
    --color-bg-light: #1a1f35;
    --color-bg-lighter: #2a2f45;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;

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

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows - More dramatic */
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px -1px rgb(0 0 0 / 0.3), 0 2px 6px -2px rgb(0 0 0 / 0.2);
    --shadow-lg: 0 10px 20px -3px rgb(0 0 0 / 0.4), 0 4px 8px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 40px -5px rgb(0 0 0 / 0.5), 0 8px 16px -8px rgb(0 0 0 / 0.4);
    --shadow-glow: 0 0 20px rgb(124 58 237 / 0.3);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #f472b6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-dark: linear-gradient(180deg, #1a1f35 0%, #0a0f1e 100%);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--gradient-dark);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Layout ===== */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.app-header {
    background: var(--color-bg-light);
    border-bottom: 2px solid rgba(124, 58, 237, 0.2);
    padding: var(--spacing-lg) 0;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.app-main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

.app-footer {
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-bg-lighter);
    padding: var(--spacing-lg) 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===== Header ===== */
.app-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo:hover {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-md);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #a78bfa 0%, #7c3aed 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn-primary:hover:not(:disabled)::before {
    opacity: 1;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary > * {
    position: relative;
    z-index: 1;
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f472b6 0%, #ec4899 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn-secondary:hover:not(:disabled)::before {
    opacity: 1;
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgb(236 72 153 / 0.3);
}

.btn-secondary > * {
    position: relative;
    z-index: 1;
}

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

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ===== Cards ===== */
.card {
    background: var(--color-bg-light);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(124, 58, 237, 0.15);
    transition: all var(--transition-base);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-bg-lighter);
}

.card-body {
    margin-bottom: var(--spacing-lg);
}

.card-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-bg-lighter);
}

/* ===== Grid ===== */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid rgba(124, 58, 237, 0.3);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 1rem;
    transition: all var(--transition-fast);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2), 0 0 0 3px rgba(124, 58, 237, 0.1);
    background: var(--color-bg-light);
}

.form-input:hover {
    border-color: rgba(124, 58, 237, 0.5);
}

.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid rgba(124, 58, 237, 0.3);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2), 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-select:hover {
    border-color: rgba(124, 58, 237, 0.5);
}

/* ===== Toast Notifications ===== */
#toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    color: white;
    font-weight: 600;
    opacity: 0;
    transform: translateX(100%);
    transition: all var(--transition-base);
    max-width: 300px;
}

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

.toast-success {
    background: var(--color-success);
}

.toast-error {
    background: var(--color-danger);
}

.toast-info {
    background: var(--color-info);
}

.toast-warning {
    background: var(--color-warning);
}

/* ===== Loading Spinner ===== */
.spinner {
    border: 4px solid rgba(124, 58, 237, 0.2);
    border-top: 4px solid var(--color-primary);
    border-right: 4px solid var(--color-primary-light);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
    margin: var(--spacing-xl) auto;
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ===== Game Specific Styles ===== */
.game-code {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: var(--spacing-lg);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    font-family: 'Courier New', monospace;
    box-shadow: inset 0 0 20px rgba(124, 58, 237, 0.2), var(--shadow-md);
    border: 2px solid rgba(124, 58, 237, 0.3);
    position: relative;
}

.game-code::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0.5;
}

.qr-code {
    text-align: center;
    padding: var(--spacing-lg);
}

.qr-code img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
}

.choice-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.choice-btn {
    width: 130px;
    height: 130px;
    border-radius: 24px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    font-size: 4rem;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.choice-btn::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
    border-radius: 24px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.choice-btn:hover:not(:disabled) {
    transform: scale(1.15) translateY(-5px);
    box-shadow: var(--shadow-xl), 0 0 30px currentColor;
}

.choice-btn:hover:not(:disabled)::before {
    opacity: 1;
}

.choice-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.choice-rock {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    color: #64748b;
}

.choice-paper {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #fbbf24;
}

.choice-scissors {
    background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
    color: #f43f5e;
}

.shake-counter {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.progress-ring {
    width: 220px;
    height: 220px;
    margin: var(--spacing-xl) auto;
    position: relative;
    filter: drop-shadow(0 0 15px rgba(124, 58, 237, 0.4));
}

.progress-ring-circle {
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

.countdown {
    font-size: 5rem;
    font-weight: 800;
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: countdownPulse 1s ease-in-out infinite;
    text-shadow: 0 0 30px rgba(124, 58, 237, 0.5);
}

@keyframes countdownPulse {
    0%, 100% {
        transform: scale(1);
        filter: brightness(1);
    }
    50% {
        transform: scale(1.2);
        filter: brightness(1.3);
    }
}

.winner-announcement {
    text-align: center;
    font-size: 3rem;
    font-weight: 800;
    margin: var(--spacing-2xl) 0;
    animation: winnerReveal 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    text-shadow: 0 4px 12px currentColor;
    letter-spacing: 0.05em;
}

@keyframes winnerReveal {
    0% {
        opacity: 0;
        transform: translateY(-50px) scale(0.8) rotateX(-90deg);
    }
    60% {
        transform: translateY(10px) scale(1.1) rotateX(10deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0);
    }
}

.score-board {
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-xl);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    margin: var(--spacing-lg) 0;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3), var(--shadow-md);
    border: 1px solid rgba(124, 58, 237, 0.2);
    gap: var(--spacing-lg);
}

.score-item {
    text-align: center;
    flex: 1;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.score-item:hover {
    background: rgba(124, 58, 237, 0.05);
}

.score-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.score-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Stats Cards ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid rgba(124, 58, 237, 0.2);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: rgba(124, 58, 237, 0.4);
}

.stat-card:hover::before {
    opacity: 0.05;
}

.stat-card > * {
    position: relative;
    z-index: 1;
}

.stat-value {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .game-code {
        font-size: 2rem;
        letter-spacing: 0.3rem;
    }

    .choice-btn {
        width: 90px;
        height: 90px;
        font-size: 2.5rem;
    }

    .countdown {
        font-size: 3rem;
    }

    #toast-container {
        right: var(--spacing-md);
        left: var(--spacing-md);
    }

    .toast {
        max-width: 100%;
    }
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-muted);
}

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }

.hidden {
    display: none;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

/* ===== Hero Section ===== */
.hero {
    position: relative;
    padding: var(--spacing-2xl) 0;
}

.hero h1 {
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero .logo-icon {
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* ===== Enhanced QR Code ===== */
.qr-code img {
    border: 4px solid rgba(124, 58, 237, 0.3);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(124, 58, 237, 0.2);
    transition: all var(--transition-base);
}

.qr-code img:hover {
    transform: scale(1.05);
    border-color: rgba(124, 58, 237, 0.5);
    box-shadow: var(--shadow-xl), 0 0 40px rgba(124, 58, 237, 0.3);
}

/* ===== Improved Button Outline ===== */
.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    position: relative;
    overflow: hidden;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn-outline:hover:not(:disabled) {
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-outline:hover:not(:disabled)::before {
    opacity: 1;
}

.btn-outline > * {
    position: relative;
    z-index: 1;
}