/* Reset e Configurações Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Cores principais - inspiradas no Speedtest.net */
    --primary-blue: #0066cc;
    --primary-blue-dark: #0052a3;
    --secondary-blue: #4da6ff;
    --accent-green: #00cc66;
    --accent-orange: #ff9900;
    --accent-red: #ff4444;
    
    /* Neutros */
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --black: #000000;
    
    /* Cores do relógio */
    --clock-bg: linear-gradient(145deg, #ffffff, #f0f0f0);
    --clock-border: #e0e0e0;
    --clock-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    --hand-color: #0066cc;
    --hand-glow: rgba(0, 102, 204, 0.3);
    --scale-color: #6c757d;
    --scale-light: #dee2e6;
    
    /* Tipografia */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Transições */
    --transition-fast: 150ms ease-out;
    --transition-base: 300ms ease-out;
    --transition-slow: 500ms ease-out;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    color: var(--gray-700);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container Principal */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding: 1.5rem 0;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-blue);
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-800);
    letter-spacing: -0.025em;
}

.connection-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

/* Relógio de Velocidade - Inspirado no Speedtest.net */
.speed-clock-section {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 3rem;
}

.speed-clock-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.speed-clock {
    position: relative;
    width: 320px;
    height: 320px;
    background: var(--clock-bg);
    border-radius: 50%;
    border: 8px solid var(--white);
    box-shadow: var(--clock-shadow);
    overflow: hidden;
    transition: transform var(--transition-base);
}

.speed-clock:hover {
    transform: scale(1.02);
}

/* Face do relógio */
.clock-face {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

/* Escala externa com números */
.scale-outer {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.scale-mark {
    position: absolute;
    width: 2px;
    height: 20px;
    background: var(--scale-color);
    top: 10px;
    left: 50%;
    transform-origin: center 150px;
    transform: translateX(-50%) rotate(calc(var(--i) * 36deg));
    border-radius: 1px;
}

.scale-mark:nth-child(5n+1) {
    height: 30px;
    background: var(--gray-700);
    width: 3px;
}

.scale-mark span {
    position: absolute;
    top: 35px;
    left: 50%;
    transform: translateX(-50%) rotate(calc(var(--i) * -36deg));
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--gray-600);
    white-space: nowrap;
}

/* Marcas internas (0-100) */
.scale-inner {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.inner-marks {
    position: absolute;
    width: 100%;
    height: 100%;
    background: conic-gradient(
        from 0deg,
        transparent 0deg,
        var(--scale-light) 1deg,
        transparent 2deg,
        transparent 3.6deg,
        var(--scale-light) 4.6deg,
        transparent 5.6deg
    );
    background-size: 100% 100%;
    background-repeat: no-repeat;
    border-radius: 50%;
    opacity: 0.6;
}

/* Centro do relógio com informações */
.clock-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    width: 120px;
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.speed-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1;
    margin-bottom: 0.25rem;
    font-variant-numeric: tabular-nums;
}

.speed-unit {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
    margin-bottom: 0.125rem;
}

.speed-label {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Ponteiro do relógio */
.clock-hand {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 4px;
    height: 120px;
    transform-origin: center bottom;
    transform: translate(-50%, -100%) rotate(-90deg);
    z-index: 20;
    transition: transform var(--transition-slow);
}

.hand-body {
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, var(--hand-color), var(--secondary-blue));
    border-radius: 2px 2px 0 0;
    box-shadow: 0 0 20px var(--hand-glow);
    position: relative;
}

.hand-body::before {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--hand-color);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hand-center {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--white);
    border: 4px solid var(--hand-color);
    border-radius: 50%;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
    z-index: 30;
}

/* Arco de progresso (semelhante ao Speedtest) */
.progress-arc {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: var(--gray-200);
    stroke-width: 8;
    stroke-linecap: round;
}

.progress-fill {
    fill: none;
    stroke: var(--primary-blue);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 440;
    stroke-dashoffset: 440;
    transition: stroke-dashoffset var(--transition-slow);
    filter: drop-shadow(0 0 10px var(--hand-glow));
}

/* Controles do relógio */
.clock-controls {
    text-align: center;
    width: 100%;
}

.speed-status {
    font-size: var(--font-size-base);
    color: var(--gray-600);
    margin-bottom: 1rem;
    min-height: 1.5rem;
    font-weight: 500;
}

.speed-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.speed-progress .progress-bar {
    width: 200px;
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.speed-progress .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 3px;
    width: 0%;
    transition: width var(--transition-base);
}

.speed-progress .progress-text {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    font-weight: 500;
}

/* Botões de Controle */
.control-section {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.control-button, .stop-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: 2rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.025em;
    min-width: 160px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.control-button {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
}

.control-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 102, 204, 0.3);
}

.stop-button {
    background: linear-gradient(135deg, var(--accent-red), #ff6666);
    color: var(--white);
}

.stop-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 68, 68, 0.3);
}

.button-icon {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.button-icon svg {
    width: 100%;
    height: 100%;
}

/* Seções de Resultados e Histórico */
.results-section, .history-section {
    background: var(--white);
    border-radius: 1.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--gray-200);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--gray-50), var(--white));
    border-radius: 1rem;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.result-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-blue);
    opacity: 0.8;
}

.result-icon svg {
    width: 100%;
    height: 100%;
}

.result-info {
    flex: 1;
}

.result-label {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.result-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-800);
    font-variant-numeric: tabular-nums;
}

/* Gráfico */
.chart-container {
    background: var(--gray-50);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--gray-200);
}

/* Ações e Botões Secundários */
.actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
    border-radius: 1rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.025em;
    min-width: 120px;
}

.secondary-button:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
}

/* Títulos e Seções */
.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
    text-align: center;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--gray-50);
    border-radius: 0.75rem;
    border: 1px solid var(--gray-200);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.history-item:hover {
    background: var(--gray-100);
    transform: translateX(4px);
}

.history-date {
    color: var(--gray-600);
    font-weight: 500;
}

.history-speed {
    color: var(--gray-800);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    opacity: 0.6;
}

/* Footer */
.footer {
    text-align: center;
    padding-top: 2rem;
    margin-top: auto;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-content {
    text-align: center;
    color: var(--gray-700);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.loading-text {
    font-size: var(--font-size-base);
    color: var(--gray-600);
    font-weight: 500;
}

/* Animações */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in-up {
    animation: fadeInUp var(--transition-slow);
}

/* Responsividade */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .speed-clock {
        width: 280px;
        height: 280px;
    }
    
    .speed-value {
        font-size: var(--font-size-2xl);
    }
    
    .clock-center {
        width: 100px;
        height: 100px;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .actions {
        flex-direction: column;
        align-items: center;
    }
    
    .secondary-button {
        width: 100%;
        max-width: 200px;
    }
    
    .control-button, .stop-button {
        min-width: 140px;
        padding: 0.875rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .speed-clock {
        width: 240px;
        height: 240px;
    }
    
    .speed-value {
        font-size: var(--font-size-xl);
    }
    
    .clock-center {
        width: 80px;
        height: 80px;
    }
    
    .scale-mark span {
        font-size: 0.7rem;
    }
}

/* Tema Escuro */
@media (prefers-color-scheme: dark) {
    :root {
        --clock-bg: linear-gradient(145deg, #2a2a2a, #1a1a1a);
        --clock-border: #333;
        --clock-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        --scale-color: #aaa;
        --scale-light: #444;
    }
    
    body {
        background: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
        color: var(--gray-200);
    }
    
    .speed-clock {
        background: var(--clock-bg);
        border-color: var(--clock-border);
    }
    
    .clock-center {
        background: rgba(40, 40, 40, 0.9);
        color: var(--gray-100);
    }
    
    .speed-value {
        color: var(--gray-100);
    }
    
    .speed-unit {
        color: var(--gray-400);
    }
    
    .speed-label {
        color: var(--gray-500);
    }
    
    .results-section, .history-section {
        background: var(--gray-800);
        border-color: var(--gray-700);
    }
    
    .result-card {
        background: linear-gradient(135deg, var(--gray-700), var(--gray-800));
        border-color: var(--gray-600);
    }
    
    .history-item {
        background: var(--gray-700);
        border-color: var(--gray-600);
    }
    
    .history-item:hover {
        background: var(--gray-600);
    }
}