/* css/styles.css */
:root {
    --bg-color: #0b1120;
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.12);
    --title-color: #ffffff;
    --label-color: #ffffff;
    --card-shadow: none;
    --icon-shadow: none;
    
    --icon-size: 48px;
    --icon-radius: 50%;
    --btn-padding-v: 8px;
    --btn-padding-h: 16px;
    --btn-radius: 50px;
    --setting-size: 48px;
    --setting-radius: 50%;
    
    --title-size: 22px;
    --title-spacing: 0px;
    --label-size: 14px;
    --label-spacing: 0px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    overflow-y: auto;
    background-color: var(--bg-color);
    color: var(--title-color);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}

body {
    padding: calc(env(safe-area-inset-top) + 16px) calc(env(safe-area-inset-right) + 16px) calc(env(safe-area-inset-bottom) + 80px) calc(env(safe-area-inset-left) + 16px);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-title {
    font-size: var(--title-size); 
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: var(--title-spacing);
    color: var(--title-color);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    width: 100%;
    max-width: 420px;
}

.btn-action {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--btn-radius); 
    padding: var(--btn-padding-v) var(--btn-padding-h) var(--btn-padding-v) var(--btn-padding-v);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    box-shadow: var(--card-shadow);
    transition: transform 0.1s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden;
}

.btn-action:active {
    transform: scale(0.95);
    background: rgba(255, 255, 255, 0.2);
}

.btn-action.active {
    border-color: #34c759;
    box-shadow: 0 0 12px rgba(52, 199, 89, 0.6), var(--card-shadow);
}

.btn-action img, .slider-action-container img {
    width: var(--icon-size);
    height: var(--icon-size);
    border-radius: var(--icon-radius);
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--icon-shadow);
    background-color: transparent;
}

.btn-action span.btn-label {
    font-size: var(--label-size); 
    font-weight: 500;
    letter-spacing: var(--label-spacing);
    color: var(--label-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
}

/* Các thanh trượt hệ thống */
.slider-action-container {
    grid-column: 1 / -1; 
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--btn-radius);
    padding: var(--btn-padding-v) var(--btn-padding-h) var(--btn-padding-v) var(--btn-padding-v);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--card-shadow);
    transition: transform 0.1s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.slider-wrapper {
    position: relative;
    flex-grow: 1;
    display: flex;
    align-items: center;
    height: 100%;
}

/* Sửa lỗi vạch ngang thanh tiến trình, độc lập hoàn toàn với input[type=range] chung */
.sys-custom-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.2); /* Vạch trắng mờ cho chế độ tối */
    border-radius: 4px;
    outline: none;
    border: none;
    --val: 50%; 
    background-image: linear-gradient(to right, #34c759 var(--val), transparent var(--val));
}

.sys-custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 28px;
    height: 28px;
    background-color: transparent;
    background-size: cover;
    background-position: center;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* Ẩn track native bị trùng lấp gây lỗi vạch ngang trên sys-custom-slider */
.sys-custom-slider::-webkit-slider-runnable-track {
    background: transparent;
    border: none;
}

#vol-slider::-webkit-slider-thumb { background-image: url('../icons/volume-dot.png'); }
#bri-slider::-webkit-slider-thumb { background-image: url('../icons/brightness-dot.png'); }

.tooltip-val {
    position: absolute;
    top: -35px;
    left: 50%; 
    transform: translateX(-50%);
    background: rgba(0,0,0,0.85);
    color: #fff;
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    white-space: nowrap;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.tooltip-val.show {
    opacity: 1;
}

.settings-btn {
    position: fixed;
    bottom: max(16px, env(safe-area-inset-bottom));
    right: max(16px, env(safe-area-inset-right));
    width: var(--setting-size);
    height: var(--setting-size);
    border-radius: var(--setting-radius);
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-btn img {
    width: var(--setting-size);
    height: var(--setting-size);
    border-radius: var(--setting-radius);
    object-fit: contain;
    background-color: transparent;
}

.info-btn-wrapper {
    display: flex;
    justify-content: flex-end;
    width: 100%;
    margin-top: 15px;
}

.info-btn {
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-btn img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.settings-panel {
    visibility: hidden;
    opacity: 0;
    transform: scale(0.95);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100dvh;
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 200;
    display: flex;
    flex-direction: column;
    padding: calc(env(safe-area-inset-top) + 20px) 20px calc(env(safe-area-inset-bottom) + 20px);
    overflow-y: auto;
    transition: visibility 0.3s, opacity 0.3s ease, transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.3s ease, backdrop-filter 0.3s ease;
}

/* Nhận diện giao diện sáng tối theo hệ thống */
@media (prefers-color-scheme: light) {
    /* Đóng khung Settings đẹp hơn cho Light Mode */
    .settings-panel {
        background: rgba(240, 240, 245, 0.95);
        color: #000;
    }
    .close-btn { color: #000 !important; }
    .settings-panel .toggle-text,
    .settings-panel label { color: #000; }
    .shadow-setting-group { border-left-color: rgba(0, 0, 0, 0.15) !important; }
    .slider { background-color: rgba(0, 0, 0, 0.1) !important; }
    .info-body a { color: #007aff; }
    .info-desc { opacity: 0.7; }
    
    /* Vạch đen mờ cho chế độ sáng */
    .sys-custom-slider { background-color: rgba(0, 0, 0, 0.15); }
}

#info-panel {
    z-index: 300;
}

.settings-panel.active { 
    visibility: visible;
    opacity: 1;
    transform: scale(1);
}

.settings-panel.faded {
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

.settings-panel.faded:not(.has-active-slider) > * {
    opacity: 0 !important;
    pointer-events: none !important;
}

.settings-panel.has-active-slider .settings-header,
.settings-panel.has-active-slider .settings-body > .setting-group:not(.active-slider),
.settings-panel.has-active-slider .settings-actions,
.settings-panel.has-active-slider .info-btn-wrapper {
    opacity: 0 !important;
    pointer-events: none !important;
}

.settings-panel.has-active-slider .shadow-controls,
.settings-panel.has-active-slider .sys-controls,
.settings-panel.has-active-slider .shadow-setting-group {
    border-top-color: transparent !important;
}

.settings-panel.has-active-slider .shadow-controls > h3,
.settings-panel.has-active-slider .shadow-controls > .setting-group:not(.active-slider),
.settings-panel.has-active-slider .shadow-setting-group > .setting-group:not(.active-slider),
.settings-panel.has-active-slider .sys-controls > h3,
.settings-panel.has-active-slider .sys-controls > .setting-group:not(.active-slider) {
    opacity: 0 !important;
    pointer-events: none !important;
}

.settings-panel.faded .active-slider {
    opacity: 1;
    transform: scale(1.02);
}

.settings-panel * {
    transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    max-width: 420px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.close-btn {
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
}

.settings-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 420px;
    width: 100%;
    margin: 0 auto;
    padding-bottom: 40px; 
}

.info-body h3 {
    margin-bottom: 10px;
}
.info-body p {
    margin-bottom: 8px;
    font-size: 0.95rem;
}
.info-body a { 
    color: #007aff; 
    text-decoration: none; 
    font-weight: bold; 
}
.info-desc { 
    margin-top: 15px; 
    font-size: 0.9rem; 
    line-height: 1.5; 
    opacity: 0.85; 
}

.setting-group { display: flex; flex-direction: column; gap: 6px; }
.setting-group label:not(.toggle-label) { font-size: 0.85rem; opacity: 0.9; }

.shadow-setting-group {
    display: none;
    flex-direction: column;
    gap: 12px;
    margin-top: 5px;
    margin-bottom: 15px;
    padding-left: 10px;
    border-left: 2px solid rgba(255, 255, 255, 0.15);
    animation: slideDrawer 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.shadow-setting-group.active {
    display: flex;
}

@keyframes slideDrawer {
    0% { opacity: 0; transform: translateY(-10px); }
    100% { opacity: 1; transform: translateY(0); }
}

.setting-group input[type="text"], .setting-group input[type="color"] { 
    width: 100%; 
}
.setting-group input[type="color"] {
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
}
.setting-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
.setting-group input[type="color"]::-webkit-color-swatch {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
}

/* Giới hạn CSS input range chỉ áp dụng cho các slider trong bảng cài đặt, tránh xung đột */
input[type=range]:not(.sys-custom-slider) {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}
input[type=range]:not(.sys-custom-slider):focus {
    outline: none;
}
input[type=range]:not(.sys-custom-slider)::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 25px;
    width: 25px;
    background: url('../icons/icon-dot.png') center/cover no-repeat;
    cursor: pointer;
    border: none;
    border-radius: 50%;
    margin-top: -10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
input[type=range]:not(.sys-custom-slider)::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}
@media (prefers-color-scheme: light) {
    input[type=range]:not(.sys-custom-slider)::-webkit-slider-runnable-track {
        background: rgba(0, 0, 0, 0.2);
    }
}

.toggle-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    cursor: pointer;
    margin-top: 5px;
}
.toggle-text {
    font-size: 0.85rem;
    opacity: 0.9;
}
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 26px;
}
.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255, 255, 255, 0.2);
    transition: .3s;
    border-radius: 26px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
input[type="checkbox"]:checked + .slider {
    background-color: #34c759;
}
input[type="checkbox"]:checked + .slider:before {
    transform: translateX(20px);
}

.shadow-controls, .sys-controls {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 16px;
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.settings-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
}
.btn-primary, .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    font-weight: 600;
    transition: background 0.2s;
}
.btn-primary { 
    background: #007aff;
    color: #fff;
}
.btn-primary:active { background: #005bb5; }
.btn-secondary { 
    color: #a14cf6 !important; /* Xanh ngọc - Cố định cho cả 2 chế độ */
}
@media (prefers-color-scheme: light) {
    .btn-secondary { background: rgba(0, 0, 0, 0.08); }
}
.btn-secondary:active { background: rgba(13, 202, 240, 0.2); }
.action-row { 
    display: flex; 
    gap: 12px; 
}
.action-row button { 
    flex: 1; 
}
.btn-full {
    width: 100%;
    margin-top: 4px;
}

.toast-notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(50px);
    background: rgba(0, 0, 0, 0.9);
    color: #fff;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 0.95rem;
    font-weight: 500;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    pointer-events: none;
}
.toast-notification.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}