*, *::before, *::after {
    box-sizing: border-box;
}

/* ================= 테마 시스템 (주황색 포인트 컬러) ================= */
:root {
    --bg-void: #101114;
    --bg-panel: #1f2024;
    --bg-input: #2e3035;
    --ai-glow-start: #fb923c;
    --ai-glow-end: #ea580c;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: rgba(255,255,255,0.08);
    --header-bg: rgba(16, 17, 20, 0.85);
    --btn-text: #fff;
    --login-title: linear-gradient(to right, #ffffff, #94a3b8);
    --invert-text: #fff;
    --invert-bg: #000;
}

[data-theme="light"] {
    --bg-void: #f8fafc;
    --bg-panel: #ffffff;
    --bg-input: #f1f5f9;
    --ai-glow-start: #f97316;
    --ai-glow-end: #c2410c;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --header-bg: rgba(255, 255, 255, 0.9);
    --btn-text: #fff;
    --login-title: linear-gradient(to right, #0f172a, #334155);
    --invert-text: #000;
    --invert-bg: #fff;
}

/* 글로벌 스타일 */
body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Pretendard", "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-void);
    color: var(--text-main);
    width: 100%;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* 로그인 스크린 */
#loginScreen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    padding: 30px;
    background: radial-gradient(circle at center, var(--bg-panel) 0%, var(--bg-void) 100%);
}

.login-visual {
    position: relative;
    margin-bottom: 40px;
}

.app-icon {
    width: 84px;
    height: 84px;
    border-radius: 22px;
    box-shadow: 0 0 30px rgba(249, 115, 22, 0.4);
    animation: pulse-glow 3s infinite;
    background-color: var(--bg-panel);
    object-fit: cover;
}

@keyframes pulse-glow {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.03);
        opacity: 0.85;
    }
}

.login-title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 10px;
    background: var(--login-title);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

.login-subtitle {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 40px;
    text-align: center;
}

.login-box {
    width: 100%;
    max-width: 340px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

    .login-box input {
        height: 54px;
        padding: 0 20px;
        border-radius: 16px;
        border: 1px solid var(--border-color);
        background-color: var(--bg-input);
        color: var(--text-main);
        font-size: 16px;
        transition: 0.3s;
    }

        .login-box input:focus {
            outline: none;
            border-color: var(--ai-glow-start);
        }

.btn {
    height: 54px;
    border-radius: 16px;
    font-weight: 700;
    font-size: 16px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: 0.3s;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--ai-glow-start), var(--ai-glow-end));
    color: var(--btn-text);
    box-shadow: 0 8px 20px rgba(249, 115, 22, 0.25);
}

    .btn-primary:active {
        transform: scale(0.98);
        opacity: 0.9;
    }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

    .btn-outline:active {
        background: var(--bg-input);
    }

.btn-bio {
    background: var(--invert-bg);
    color: var(--invert-text);
    display: none;
}

/* 앱 메인 화면 */
#app {
    display: none;
    flex-direction: column;
    width: 100%;
    height: 100%;
    position: relative;
}

.header-container {
    background: var(--header-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.header {
    padding: calc(15px + env(safe-area-inset-top)) 20px 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-main);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s;
}

    .icon-btn:active {
        color: var(--ai-glow-start);
        transform: scale(0.9);
    }

    .icon-btn svg {
        width: 24px;
        height: 24px;
        fill: currentColor;
    }

.history-bar {
    padding: 0 20px 15px 20px;
}

.history-select {
    width: 100%;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-input);
    color: var(--text-main);
    font-size: 14px;
    outline: none;
    appearance: none;
}

/* 자주 쓰는 문장 팝업 메뉴 */
#phraseMenu {
    display: none;
    position: absolute;
    top: calc(60px + env(safe-area-inset-top));
    left: 15px;
    right: 15px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    z-index: 1001;
    overflow: hidden;
}

    #phraseMenu.show {
        display: block;
        animation: fadeIn 0.2s;
    }

.phrase-item {
    display: block;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border-color);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
}

    .phrase-item:last-child {
        border-bottom: none;
    }

    .phrase-item:active {
        background-color: var(--bg-input);
        color: var(--ai-glow-start);
    }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 채팅 영역 */
#chat {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    padding-bottom: 120px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
}

.msg-wrap {
    display: flex;
    gap: 12px;
    max-width: 90%;
    align-items: flex-start;
}

    .msg-wrap.user {
        align-self: flex-end;
        flex-direction: row-reverse;
    }

    .msg-wrap.bot {
        align-self: flex-start;
    }

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
}

.user .avatar {
    background-color: var(--bg-input);
    color: var(--text-muted);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    font-weight: 600;
}

.bot .avatar {
    background-image: url('/icon192x192.png');
    border: 1px solid var(--border-color);
    background-color: var(--bg-panel);
}

.msg {
    font-size: 16px;
    line-height: 1.6;
    word-break: break-word;
    color: var(--text-main);
    padding-top: 4px;
}

.user .msg {
    background-color: var(--bg-panel);
    padding: 10px 16px;
    border-radius: 16px 4px 16px 16px;
    border: 1px solid var(--border-color);
}

.analyzing {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-color);
    border-top-color: var(--ai-glow-start);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 입력 바 */
.input-bar {
    position: absolute;
    bottom: 20px;
    left: 15px;
    right: 15px;
    padding: 8px;
    border-radius: 28px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    z-index: 5;
}

    .input-bar input {
        flex: 1;
        height: 40px;
        background: transparent;
        border: none;
        color: var(--text-main);
        font-size: 16px;
        padding: 0 10px;
        min-width: 0;
    }

        .input-bar input:focus {
            outline: none;
        }

.round-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s;
    flex-shrink: 0;
}

.btn-mic {
    background-color: var(--bg-input);
    color: var(--text-muted);
}

    .btn-mic.recording {
        background-color: #ef4444;
        color: white;
        animation: pulse-mic 1.5s infinite;
    }

@keyframes pulse-mic {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

.btn-send {
    background-color: var(--text-main);
    color: var(--bg-panel);
}

.round-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* 설정 바텀 시트 */
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s;
}

    #overlay.show {
        display: block;
        opacity: 1;
    }

#settings {
    position: fixed;
    bottom: -100%;
    left: 0;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    background-color: var(--bg-panel);
    border-radius: 24px 24px 0 0;
    transition: bottom 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
    z-index: 1000;
    border-top: 1px solid var(--border-color);
}

    #settings.open {
        bottom: 0;
    }

.sheet-handle {
    width: 40px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    margin: 0 auto 25px;
    cursor: pointer;
}

.setting-item {
    margin-bottom: 25px;
}

.setting-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.select-wrapper {
    position: relative;
}

.select-box {
    width: 100%;
    height: 50px;
    padding: 0 15px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-input);
    font-size: 16px;
    color: var(--text-main);
    outline: none;
    appearance: none;
}

.select-wrapper::after {
    content: '▼';
    font-size: 12px;
    color: var(--text-muted);
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.switch-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.switch-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-main);
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 28px;
    background: var(--border-color);
    border-radius: 14px;
    cursor: pointer;
    transition: 0.3s;
}

    .toggle-switch::after {
        content: '';
        position: absolute;
        top: 3px;
        left: 3px;
        width: 22px;
        height: 22px;
        background: #fff;
        border-radius: 50%;
        transition: 0.3s;
        box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    }

input[type="checkbox"]:checked + .toggle-switch {
    background: var(--ai-glow-start);
}

    input[type="checkbox"]:checked + .toggle-switch::after {
        transform: translateX(22px);
    }

.phrase-input {
    width: 100%;
    height: 44px;
    padding: 0 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-input);
    color: var(--text-main);
    font-size: 14px;
}

/* 차트/KPI 디자인 */
.kpi-container {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.kpi-card {
    flex: 1;
    background-color: var(--bg-input);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.kpi-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.kpi-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

.chart-hold {
    margin-top: 15px;
    background-color: var(--bg-input);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}