/* static/css/style.css */

/* --- Global & Base Styles --- */
:root {
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --secondary-color: #6c757d;
    --secondary-hover-color: #5a6268;
    --success-color: #28a745;
    --success-hover-color: #218838;
    --dark-bg: #121212;
    --medium-bg: #1e1e1e;
    --light-bg: #2c2c2c;
    --text-color: #e0e0e0;
    --border-color: #444;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-color);
}

.hidden {
    display: none !important;
}

/* --- Home Screen --- */
#home-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-color: var(--medium-bg);
    padding: 20px;
    box-sizing: border-box;
    overflow-y: auto;
    padding-bottom: 40px;
    padding-top: max(40px, 5vh);
}

.home-title {
    margin-bottom: 20px;
    font-size: 28px;
    color: #fff;
    text-align: center;
}

/* Gender Selection Styles */
.gender-selection-group {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}
.gender-btn {
    padding: 10px 25px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: var(--light-bg);
    color: var(--text-color);
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}
.gender-btn.selected {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    font-weight: bold;
}


.scale-group {
    margin-bottom: 20px;
    width: 100%;
    max-width: 400px;
}

.scale-group h2 {
    font-size: 16px;
    color: var(--secondary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 15px;
}

.scale-btn {
    width: 100%;
    padding: 15px;
    margin-bottom: 10px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--light-bg);
    color: var(--text-color);
    transition: background-color 0.3s, border-color 0.3s;
    text-align: left;
}

.scale-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* --- General Button Styles --- */
.main-btn, .primary-btn, .secondary-btn {
    padding: 12px 24px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 25px;
    border: none;
    transition: background-color 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.main-btn { background-color: var(--primary-color); color: #fff; }
.main-btn:hover { background-color: var(--primary-hover-color); }
.primary-btn { background-color: var(--success-color); color: #fff; }
.primary-btn:hover { background-color: var(--success-hover-color); }
.secondary-btn { background-color: var(--secondary-color); color: #fff; }
.secondary-btn:hover { background-color: var(--secondary-hover-color); }

.button-group {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    width: 100%;
    max-width: 400px;
}

/* --- Introduction Screen --- */
#introduction-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-color: var(--medium-bg);
    padding: 25px;
    box-sizing: border-box;
}

.intro-content { max-width: 600px; text-align: center; }
#intro-title { margin-bottom: 20px; }
#intro-text-content {
    text-align: left;
    white-space: pre-wrap;
    max-height: 65vh;
    overflow-y: auto;
    line-height: 1.7;
    background-color: var(--dark-bg);
    padding: 15px;
    border-radius: 8px;
}

/* --- Video Screen --- */
#video-screen {
    position: relative;
    width: 100%;
    height: 100%;
}

.video-counter {
    position: absolute;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    color: white;
    background-color: rgba(0, 0, 0, 0.4);
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 14px;
    font-weight: 500;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
}


.video-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.video-player { width: 100%; height: 100%; object-fit: contain; }

.icon-btn {
    position: absolute;
    top: 25px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background-color: rgba(0, 0, 0, 0.5);
    background-size: 55%;
    background-repeat: no-repeat;
    background-position: center;
    cursor: pointer;
    z-index: 10;
    transition: background-color 0.3s;
}
.icon-btn:hover { background-color: rgba(0, 0, 0, 0.8); }

.back-btn {
    left: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M20 11H7.83l5.59-5.59L12 4l-8 8 8 8 1.41-1.41L7.83 13H20v-2z'/%3E%3C/svg%3E");
}
.explanation-btn {
    right: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='24px' viewBox='0 0 24 24' width='24px' fill='%23FFFFFF'%3E%3Cpath d='M0 0h24v24H0V0z' fill='none'/%3E%3Cpath d='M11 18h2v-2h-2v2zm1-16C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-14h2v6h-2V6z'/%3E%3C/svg%3E");
}

.controls {
    position: absolute;
    right: 10px;
    bottom: 80px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 10;
}

.score-btn {
    width: 112px;
    height: 63px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: transform 0.1s ease-out;
    object-fit: contain;
}
.score-btn:active { transform: scale(0.9); }

/* --- Modal Styles --- */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.7); z-index: 20;
    display: flex; justify-content: center; align-items: center;
    padding: 20px; box-sizing: border-box;
}
.modal-content {
    background-color: var(--light-bg); padding: 25px; border-radius: 16px;
    width: 100%; max-width: 500px; max-height: 85vh; overflow-y: auto;
    position: relative; box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.modal-content h2 { margin-top: 0; text-align: center; }
.modal-content p { line-height: 1.7; white-space: pre-wrap; }
.close-btn {
    position: absolute; top: 15px; right: 15px;
    font-size: 28px; color: var(--secondary-color);
    cursor: pointer; transition: color 0.3s;
}
.close-btn:hover { color: #fff; }

/* 【NEW】User ID Input styles */
#user-id-input {
    width: 80%;
    padding: 12px;
    font-size: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--dark-bg);
    color: var(--text-color);
    text-align: center;
    margin-top: 15px;
}