:root {
    --primary-color: #ffd75d; /* Amarelo GymRats */
    --primary-color-rgb: 255, 215, 0; /* Para usar com opacidade */
    --secondary-color: #0A0A0A; /* Preto GymRats */
    --text-color-light: #FFFFFF;
    --text-color-dark: #333333;
    --background-dark: #121212;
    --surface-dark: #1e1e1e; /* Usado para cards e controles */
    --surface-dark-transparent: rgba(30, 30, 30, 0.85); /* Para ilha dinâmica */
    --green-accent: #2ECC71; /* Verde para sucesso geral */
    --green-accent-rgb: 46, 204, 113; /* RGB para usar com opacidade */
    --blue-accent: #3498DB; /* Azul para o timer de descanso e dicas */
    --blue-accent-rgb: 52, 152, 219; /* RGB para usar com opacidade */
    --error-color: #E74C3C; /* Vermelho para erros */
    --error-color-rgb: 231, 76, 60; /* RGB para usar com opacidade */
    --tip-color: var(--blue-accent);
    --line-guide-color: #3498DB; /* Azul mais vibrante para guias */
    --line-target-height-color: rgba(52, 152, 219, 0.9); /* Linha de altura alvo mais visível */
    --line-dumbbell-color: rgba(189, 195, 199, 0.9); /* Cinza para halteres */
    --success-rep-color: var(--green-accent); /* Verde para o check de repetição */
    --rep-feedback-bg: rgba(46, 204, 113, 0.15); /* Fundo sutil para o check */
    --glass-effect-bg: rgba(30, 30, 30, 0.7); /* Fundo para efeito de vidro */
    --glass-effect-border: rgba(255, 255, 255, 0.1); /* Borda para efeito de vidro */
    --glass-effect-shadow: 0 8px 32px rgba(0, 0, 0, 0.2); /* Sombra para efeito de vidro */
    --camera-tint: rgba(46, 204, 113, 0.05); /* Leve tom verde para a câmera */
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-dark);
    color: var(--text-color-light);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden; /* Prevenir scroll horizontal indesejado */
}

.main-header {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 15px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
    position: sticky;
    top: 0;
    z-index: 100;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.logo-area {
    display: flex;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.logo a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

.logo a:hover {
    color: #fff;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

.main-nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    font-size: 1rem;
}

.main-nav a:hover {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
}

.hamburger-icon {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.bar {
    height: 3px;
    width: 100%;
    background-color: #fff;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.app-container {
    flex-grow: 1;
    display: flex;
    position: relative;
    width: 100%;
}

/* ================================================================== */
/* INÍCIO DA ALTERAÇÃO 1: Otimização da Exibição das Seções          */
/* ================================================================== */
.phase-section {
    width: 100%;
    min-height: calc(100vh - 70px);
    display: none; /* COMEÇA OCULTO E SEM OCUPAR ESPAÇO */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    animation: fadeIn 0.5s ease-in-out;
}

.phase-section.active {
    display: flex; 
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
/* ================================================================== */
/* FIM DA ALTERAÇÃO 1                                                 */
/* ================================================================== */


.explanation-box {
    background: linear-gradient(145deg, #232323, #1c1c1c);
    padding: 30px 35px;
    border-radius: 20px; /* Cantos mais arredondados */
    max-width: 700px;
    width: 100%;
    text-align: left;
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
    margin: 0 auto; /* Centraliza horizontalmente */
    border: 1px solid var(--glass-effect-border);
    position: relative;
    overflow: hidden;
}

.explanation-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--green-accent));
}

.explanation-box h2 { 
    color: var(--primary-color); 
    text-align: center; 
    margin-bottom: 25px; 
    font-size: 1.8em; 
    font-weight: 600;
    letter-spacing: 0.5px;
}
.explanation-box p { 
    margin-bottom: 18px; 
    line-height: 1.7; 
    font-size: 1.05em;
    color: rgba(255, 255, 255, 0.9);
}

.action-button {
    display: block;
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(145deg, var(--primary-color), #e5c100);
    color: var(--secondary-color);
    border: none;
    border-radius: 15px; /* Cantos mais arredondados */
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    text-align: center;
    margin-top: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    position: relative;
    overflow: hidden;
}

.action-button::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.5s;
}

.action-button:hover::after {
    left: 100%;
}

.action-button:hover { 
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.4);
    background: linear-gradient(145deg, #ffe033, var(--primary-color));
}

.action-button:active { 
    transform: translateY(1px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

#cameraMonitoringSection {
    justify-content: center;
    align-items: center;
    padding: 20px; /* Adicionado padding para garantir espaçamento em telas menores */
    min-height: 100vh;
    position: relative;
    flex-direction: column;
}

/* Layout para desktop - câmera centralizada com espaço nas laterais */
.camera-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.camera-view-container {
    position: relative;
    width: 100%;
    max-width: 400px; 
    aspect-ratio: 9 / 16; 
    max-height: 80vh;
    background-color: #000;
    border-radius: 20px;
    overflow: hidden;
    margin: 0 auto;
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    z-index: 1;
    transition: all 0.3s ease;
}

/* Overlay verde sutil */
.camera-view-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--camera-tint);
    pointer-events: none;
    z-index: 2;
}

/* Linha de progresso animada durante descanso */
.camera-view-container.resting-progress::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 20px;
    border: 5px solid transparent;
    animation: restProgressAnimation linear forwards;
    animation-duration: var(--rest-duration-css, 60s);
    pointer-events: none;
    z-index: 10;
    box-shadow: 0 0 20px rgba(var(--primary-color-rgb), 0.5);
}

@keyframes restProgressAnimation {
    0% { border-image: conic-gradient(var(--primary-color) 0%, transparent 0%) 1; }
    25% { border-image: conic-gradient(var(--primary-color) 25%, transparent 25%) 1;}
    50% { border-image: conic-gradient(var(--primary-color) 50%, transparent 50%) 1; }
    75% { border-image: conic-gradient(var(--primary-color) 75%, transparent 75%) 1; }
    100% { border-image: conic-gradient(var(--primary-color) 100%, transparent 100%) 1; }
}


/* ================================================================== */
/* INÍCIO DA ALTERAÇÃO 2: Correção do Zoom da Câmera                  */
/* ================================================================== */
#userVideoFeed, #guideLinesCanvas {
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    object-position: center;
}
/* ================================================================== */
/* FIM DA ALTERAÇÃO 2                                                 */
/* ================================================================== */


#userVideoFeed.mirrored { transform: scaleX(-1); }
#guideLinesCanvas { z-index: 5; }

/* Ilha dinâmica para controles */
.floating-controls {
    position: relative;
    width: 100%;
    max-width: 400px; /* Mesmo max-width da câmera para alinhamento */
    padding: 20px 25px;
    background: linear-gradient(145deg, rgba(40, 40, 40, 0.7), rgba(20, 20, 20, 0.7));
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 25px;
    border: 1px solid var(--glass-effect-border);
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-top: 25px;
    transition: all 0.3s ease;
}

.correct-rep-feedback {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.5);
    width: 120px;
    height: 120px;
    background-color: var(--rep-feedback-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease-out, transform 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28), visibility 0.2s;
    box-shadow: 0 0 30px rgba(var(--green-accent-rgb), 0.5);
}
.correct-rep-feedback.visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}
.correct-rep-feedback i {
    font-size: 4em;
    color: var(--success-rep-color);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.loading-indicator-camera {
    position: absolute; 
    top: 50%; 
    left: 50%; 
    transform: translate(-50%, -50%);
    color: var(--primary-color); 
    background-color: rgba(0,0,0,0.8);
    padding: 20px 25px; 
    border-radius: 15px; 
    z-index: 10; 
    font-size: 1.1em;
    box-shadow: 0 8px 25px rgba(0,0,0,0.5);
}
.loading-indicator-camera i { margin-right: 12px; }

/* Timer centralizado */
.rest-timer-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(145deg, rgba(40, 40, 40, 0.8), rgba(20, 20, 20, 0.8));
    color: var(--text-color-light);
    padding: 25px 35px;
    border-radius: 25px;
    font-size: 2.2em;
    font-weight: bold;
    display: none;
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
    z-index: 30;
    border: 1px solid var(--glass-effect-border);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    text-align: center;
}
.resting-blur {
    filter: blur(10px);
    transition: filter 0.5s ease-out;
}
.rest-timer-display.visible { 
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.rest-timer-display i {
    font-size: 1.3em;
    margin-bottom: 8px;
    color: var(--primary-color);
}

/* Guias visuais para o exercício */
.shoulder-guide-line {
    position: absolute;
    height: 4px;
    background: linear-gradient(90deg, 
        rgba(var(--blue-accent-rgb), 0.2) 0%, 
        rgba(var(--blue-accent-rgb), 0.9) 50%, 
        rgba(var(--blue-accent-rgb), 0.2) 100%);
    left: 0;
    width: 100%;
    z-index: 6;
    box-shadow: 0 0 15px rgba(var(--blue-accent-rgb), 0.7);
}

.target-angle-guide {
    position: absolute;
    width: 4px;
    background: linear-gradient(180deg, 
        rgba(var(--primary-color-rgb), 0.2) 0%, 
        rgba(var(--primary-color-rgb), 0.9) 50%, 
        rgba(var(--primary-color-rgb), 0.2) 100%);
    z-index: 6;
    box-shadow: 0 0 15px rgba(var(--primary-color-rgb), 0.7);
}

/* Boneco de exemplo */
.example-figure-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 7;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease;
}

.example-figure-container.visible {
    opacity: 1;
    visibility: visible;
}

.example-figure {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
}

.example-figure svg {
    width: 60%;
    height: 60%;
    filter: drop-shadow(0 0 10px rgba(var(--primary-color-rgb), 0.5));
}

/* Feedback técnico (para avisos de sistema) */
.form-feedback-container {
    width: 100%;
    padding: 12px 18px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    display: none;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(10px);
}
.form-feedback-container.visible {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}
.feedback-message {
    font-size: 1.05em;
    line-height: 1.5;
    width: 100%;
}
.feedback-message.error { 
    color: var(--error-color); 
    font-weight: bold; 
}
.feedback-message.tip { 
    color: var(--tip-color);
}
.feedback-message.success { 
    color: var(--success-rep-color); 
    font-weight: bold;
}
.feedback-message.action-state {
    color: var(--text-color-light);
    font-style: italic;
}

/* Feedback visual para erros de execução */
.execution-feedback {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(145deg, rgba(var(--error-color-rgb), 0.8), rgba(180, 30, 30, 0.8));
    color: white;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 1.1em;
    font-weight: bold;
    z-index: 25;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    text-align: center;
    max-width: 80%;
}

.execution-feedback.visible {
    opacity: 1;
    visibility: visible;
    animation: pulseError 2s infinite;
}

@keyframes pulseError {
    0% { transform: translateX(-50%) scale(1); }
    50% { transform: translateX(-50%) scale(1.05); }
    100% { transform: translateX(-50%) scale(1); }
}

.workout-status {
    display: flex;
    justify-content: space-around;
    font-size: 1.15em;
    color: var(--text-color-light);
    width: 100%;
    gap: 20px;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 12px 15px;
    border-radius: 15px;
}
.workout-status p { margin: 0; }
.workout-status span { 
    color: var(--primary-color); 
    font-weight: bold;
}

.set-complete-message, .workout-complete-message {
    color: var(--green-accent);
    font-weight: bold;
    display: none;
    font-size: 1.2em;
    text-align: center;
    width: 100%;
    padding: 10px;
    background-color: rgba(var(--green-accent-rgb), 0.1);
    border-radius: 15px;
    border: 1px solid rgba(var(--green-accent-rgb), 0.2);
}
.set-complete-message.visible, .workout-complete-message.visible { 
    display: block; 
}

.action-buttons-monitoring {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: 20px;
    margin-top: 10px;
}

.control-button {
    background: linear-gradient(145deg, rgba(50, 50, 50, 0.4), rgba(30, 30, 30, 0.4));
    color: var(--text-color-light);
    border: 1px solid rgba(var(--primary-color-rgb), 0.3);
    width: 54px;
    height: 54px;
    border-radius: 50%;
    font-size: 1.3em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}
.control-button:hover {
    background: linear-gradient(145deg, rgba(var(--primary-color-rgb), 0.2), rgba(var(--primary-color-rgb), 0.1));
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}
.control-button:active {
    transform: translateY(1px);
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
}

.action-button.main-action {
    width: 70px;
    height: 70px;
    font-size: 2em;
    background: linear-gradient(145deg, var(--primary-color), #e5c100);
    color: var(--secondary-color);
    border-radius: 50%;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: none;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}
.action-button.main-action:hover {
    background: linear-gradient(145deg, #ffe033, var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.4);
}
.action-button.main-action:active {
    transform: translateY(1px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

/* Estilos para o personagem (landmarks) */
.landmark-style {
    color: var(--primary-color);
    fill: var(--primary-color);
    stroke-width: 3px;
}
.connector-style {
    stroke: var(--primary-color);
    stroke-width: 3px;
}

/* Espaços laterais para logos (apenas desktop) */
.side-space {
    display: none; /* Oculto por padrão */
    background: linear-gradient(145deg, #1a1a1a, #0d0d0d);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsividade */
@media (min-width: 1024px) {
    .camera-container {
        display: grid;
        grid-template-columns: 1fr 640px 1fr;
        gap: 30px;
        padding: 20px;
    }
    
    .side-space {
        display: block;
        height: 100%;
        min-height: 400px;
    }
    
    .side-space.left {
        grid-column: 1;
    }
    
    .side-space.right {
        grid-column: 3;
    }
    
    .camera-view-container {
        grid-column: 2;
    }
    
    .floating-controls {
        margin-top: 25px;
    }
    
    .explanation-box {
        width: 80%;
        max-width: 800px;
        margin: 0 auto;
    }

    #cameraMonitoringSection {
        padding: 30px;
    }
}

/* Tablets */
@media (max-width: 1023px) and (min-width: 768px) {
    .camera-view-container {
        max-width: 80%;
    }
    
    .floating-controls {
        max-width: 80%;
    }
    
    .hamburger-icon {
        display: flex;
    }
    
    .menu-toggle:checked ~ .main-nav {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--secondary-color);
        padding: 20px;
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 100;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .explanation-box {
        width: 90%;
        margin: 0 auto;
    }
}

/* Mobile - tela cheia */
@media (max-width: 767px) {
    #cameraMonitoringSection {
        padding: 0;
        height: 100vh; 
    }
    
    .camera-container {
        width: 100%;
        height: 100%;
    }
    
    .camera-view-container {
        width: 100%;
        height: 100%;
        max-width: 100%;
        max-height: 100vh;
        aspect-ratio: auto; /* Permite que a câmera ocupe a tela inteira do celular */
        border-radius: 0;
    }
    
    /* Garantir que a alteração de object-fit se aplique aqui também */
    #userVideoFeed, #guideLinesCanvas {
        object-fit: cover; /* Cobre a tela em mobile */
    }
    
    .floating-controls {
        position: absolute;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        width: 90%;
        max-width: 90%;
        margin-top: 0;
    }
    
    .rest-timer-display {
        width: 80%;
        max-width: 300px;
    }
    
    .hamburger-icon {
        display: flex;
    }
    
    .menu-toggle:checked ~ .main-nav {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--secondary-color);
        padding: 20px;
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 100;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 15px;
    }
    
    .explanation-box {
        width: 100%;
        margin: 0 auto;
        padding: 25px;
    }
    
    .explanation-box h2 {
        font-size: 1.6em;
    }
    
    .explanation-box p {
        font-size: 1em;
    }
    
    .execution-feedback {
        width: 90%;
        font-size: 1em;
    }
}

/* Ajustes para telas muito pequenas */
@media (max-width: 360px) {
    .control-button {
        width: 42px;
        height: 42px;
        font-size: 1em;
    }
    
    .action-button.main-action {
        width: 56px;
        height: 56px;
        font-size: 1.6em;
    }
    
    .workout-status {
        font-size: 0.9em;
        gap: 10px;
    }
    
    .floating-controls {
        padding: 12px;
    }
    
    .explanation-box {
        padding: 20px;
    }
    
    .explanation-box h2 {
        font-size: 1.4em;
    }
}

/* Orientação paisagem em dispositivos móveis */
@media (max-height: 500px) and (orientation: landscape) {
    .camera-container {
        flex-direction: row;
        height: calc(100vh - 40px);
    }
    
    .camera-view-container {
        height: 100%;
        width: 60%;
        max-width: none;
    }
    
    .floating-controls {
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
        width: 35%;
        height: auto;
        max-width: 300px;
    }
}