/* ACTR Research Chat — Orange / Gray / White theme */
:root {
    --orange: #e67e22;
    --orange-dark: #d35400;
    --orange-light: #f39c12;
    --orange-pale: #fdebd0;
    --gray-900: #2d3436;
    --gray-700: #636e72;
    --gray-500: #95a5a6;
    --gray-300: #dfe6e9;
    --gray-100: #f5f6fa;
    --white: #ffffff;
    --success: #27ae60;
    --danger: #e74c3c;
    --primary: var(--orange);
    --secondary: var(--orange-dark);
    --primary-gradient: linear-gradient(135deg, var(--orange) 0%, var(--orange-dark) 100%);
    --bg-color: var(--gray-100);
    --own-msg: var(--orange);
    --other-msg: var(--white);
    --header-height: 60px;
    --fs-lg: 1.5rem;
    --fs-md: 1.0625rem;
    --fs-sm: 0.875rem;
    --shadow-sm: 0 1px 3px rgba(45, 52, 54, 0.08);
    --shadow-md: 0 4px 16px rgba(45, 52, 54, 0.1);
    --radius: 12px;
    --font: "Inter", "Avenir Next", "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-chat: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --field-min-height: 48px;
    --field-padding-y: 12px;
    --field-padding-x: 14px;
    --field-textarea-min-height: 108px;
    --field-prompt-min-height: 200px;
}

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

body {
    font-family: var(--font);
    font-size: var(--fs-md);
    line-height: 1.5;
    color: var(--gray-900);
    background: var(--bg-color);
}

body.font-chat,
body.font-chat input,
body.font-chat textarea,
body.font-chat button,
body.font-chat select {
    font-family: var(--font-chat);
}

body.has-top-nav {
    padding-top: calc(var(--header-height) + 10px) !important;
}

/* Nav — shared on Dashboard, Admin, Manual, Chat, Wait */
.nav-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 0 24px;
    height: var(--header-height);
    display: flex;
    align-items: center;
    gap: 24px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--gray-300);
}

.nav-logo {
    font-weight: 800;
    font-size: 1.625rem;
    color: var(--orange);
    text-decoration: none;
    flex-shrink: 0;
    letter-spacing: -0.02em;
}

.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 700;
    font-size: 1.0625rem;
    padding: 8px 14px;
    border-radius: 8px;
    transition: all 0.15s;
}
.nav-links a:hover { color: var(--orange-dark); background: var(--orange-pale); }
.nav-links a.active { color: var(--orange-dark); background: var(--orange-pale); }

.page-title {
    font-size: var(--fs-lg);
    font-weight: 800;
    color: var(--orange-dark);
    line-height: 1.2;
}

/* Apple-style segmented control (Dashboard) */
.segmented {
    display: inline-flex;
    padding: 3px;
    background: var(--gray-300);
    border-radius: 10px;
    gap: 2px;
}
.segmented button {
    border: none;
    background: transparent;
    color: var(--gray-700);
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.segmented button:hover { color: var(--gray-900); }
.segmented button.active {
    background: var(--white);
    color: var(--gray-900);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.surface {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

/* Buttons */
.btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.15s;
}
.btn-primary:hover { opacity: 0.92; }

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-300);
}

/* Admin / Dashboard — unified white fields (same width + height per row) */
.card input:not([type="range"]):not([type="checkbox"]):not([type="radio"]):not([type="submit"]):not([type="button"]),
.card select,
.form-group input:not([type="range"]):not([type="checkbox"]):not([type="radio"]):not([type="submit"]):not([type="button"]),
.form-group select,
.bot-card input:not([type="range"]):not([type="checkbox"]):not([type="radio"]),
.bot-card select {
    display: block;
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    min-height: var(--field-min-height);
    padding: var(--field-padding-y) var(--field-padding-x);
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    font-size: var(--fs-md);
    font-family: inherit;
    line-height: 1.45;
    color: var(--gray-900);
    background-color: var(--white);
    transition: border-color 0.15s, box-shadow 0.15s;
    -webkit-appearance: none;
    appearance: none;
}

.card textarea.prompt-field,
.form-group textarea.prompt-field,
.bot-card textarea.prompt-field {
    min-height: var(--field-prompt-min-height);
}

.card textarea,
.form-group textarea,
.bot-card textarea {
    display: block;
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    min-height: var(--field-textarea-min-height);
    padding: var(--field-padding-y) var(--field-padding-x);
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    font-size: var(--fs-md);
    font-family: inherit;
    line-height: 1.45;
    color: var(--gray-900);
    background-color: var(--white);
    transition: border-color 0.15s, box-shadow 0.15s;
    resize: vertical;
}

.card select,
.form-group select,
.bot-card select {
    padding-right: 40px;
    background-color: var(--white);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23636e72' d='M3 4.5 6 7.5 9 4.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 12px;
    cursor: pointer;
}

.card .grid-2 .form-group,
.card .grid-3 .form-group,
.form-group {
    display: flex;
    flex-direction: column;
}

.card .grid-2 .form-group > label + input,
.card .grid-2 .form-group > label + select,
.card .grid-3 .form-group > label + input,
.card .grid-3 .form-group > label + select,
.form-group > label + input,
.form-group > label + select {
    flex: 1 1 auto;
}

.card select option,
.form-group select option,
.bot-card select option {
    background-color: var(--white);
    color: var(--gray-900);
}

.card input:not([type="range"]):focus,
.card select:focus,
.card textarea:focus,
.form-group input:not([type="range"]):focus,
.form-group select:focus,
.form-group textarea:focus,
.bot-card input:not([type="range"]):focus,
.bot-card select:focus,
.bot-card textarea:focus {
    outline: none;
    border-color: var(--orange);
    box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.15);
    background-color: var(--white);
}

.card input:disabled,
.card select:disabled,
.card textarea:disabled,
.form-group input:disabled,
.form-group select:disabled,
.form-group textarea:disabled,
.bot-card input:disabled,
.bot-card select:disabled,
.bot-card textarea:disabled,
#sessionDetailForm.readonly input,
#sessionDetailForm.readonly select,
#sessionDetailForm.readonly textarea {
    background-color: var(--gray-100) !important;
    color: var(--gray-700);
    border-color: var(--gray-300);
    cursor: not-allowed;
    opacity: 1;
    box-shadow: none;
}

.field-note {
    font-size: var(--fs-md);
    color: var(--gray-700);
    margin: 0 0 16px;
    line-height: 1.55;
    padding: var(--field-padding-y) var(--field-padding-x);
    background: var(--gray-100);
    border: 2px solid var(--gray-300);
    border-radius: 8px;
}