:root {
    /* Light Theme (Default) */
    --bg-gradient: radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%), radial-gradient(at 50% 0%, hsla(225, 39%, 30%, 1) 0, transparent 50%), radial-gradient(at 100% 0%, hsla(339, 49%, 30%, 1) 0, transparent 50%);
    --bg-color: #f0f4f8;
    /* Fallback */

    /* Glass Effect Variables */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
    --glass-blur: blur(12px);

    --surface-color: rgba(255, 255, 255, 0.75);
    --header-bg: rgba(255, 255, 255, 0.7);

    --text-primary: #1e293b;
    --text-secondary: #475569;
    --border-color: rgba(226, 232, 240, 0.6);

    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-bg: rgba(241, 245, 249, 0.8);
    --secondary-hover: rgba(226, 232, 240, 0.8);

    --success-color: #10b981;
    --success-hover: #059669;
    --danger-color: #ef4444;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);

    --font-family: 'Noto Sans JP', sans-serif;
    --header-height: 70px;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    /* Darker, richer gradient for Dark Mode */
    --bg-gradient: radial-gradient(at 0% 0%, hsla(253, 16%, 7%, 1) 0, transparent 50%), radial-gradient(at 50% 0%, hsla(225, 39%, 20%, 1) 0, transparent 50%), radial-gradient(at 100% 0%, hsla(339, 49%, 20%, 1) 0, transparent 50%);

    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);

    --surface-color: rgba(30, 41, 59, 0.7);
    --header-bg: rgba(15, 23, 42, 0.7);

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: rgba(51, 65, 85, 0.6);

    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --secondary-bg: rgba(51, 65, 85, 0.6);
    --secondary-hover: rgba(71, 85, 105, 0.8);
    --success-color: #34d399;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    padding-top: var(--header-height);
    min-height: 100vh;

    /* Background Gradient Mesh */
    background-image:
        radial-gradient(at 0% 0%, hsla(217, 91%, 60%, 0.15) 0, transparent 50%),
        radial-gradient(at 50% 0%, hsla(280, 87%, 65%, 0.15) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(189, 88%, 57%, 0.15) 0, transparent 50%);
    background-attachment: fixed;
    background-size: cover;
}

/* Glass Mixin Class */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Header */
.header {
    background: var(--header-bg);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

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

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

h1::before {
    content: '';
    display: block;
    width: 6px;
    height: 24px;
    background: linear-gradient(to bottom, var(--primary-color), var(--success-color));
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.4);
}

/* Controls - Glassmorphism */
.controls {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);

    padding: 1.5rem;
    border-radius: 16px;
    margin: 2rem 0;
}

.filter-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 1rem;
}

select,
input[type="text"] {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    background-color: rgba(255, 255, 255, 0.5);
    /* Semi-transparent inputs */
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s;
}

[data-theme="dark"] select,
[data-theme="dark"] input[type="text"] {
    background-color: rgba(15, 23, 42, 0.5);
}

select:focus,
input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
    background-color: var(--bg-color);
}

select {
    min-width: 160px;
    cursor: pointer;
}

input[type="text"] {
    flex: 1;
    min-width: 250px;
}

/* Buttons */
button {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3), 0 2px 4px -1px rgba(59, 130, 246, 0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.4), 0 4px 6px -2px rgba(59, 130, 246, 0.2);
}

.btn-secondary {
    background: var(--secondary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    transform: translateY(-1px);
}

.btn-form {
    background: linear-gradient(135deg, var(--success-color), var(--success-hover));
    color: white;
    padding: 0.75rem 2.5rem;
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.3);
    border-radius: 99px;
    /* Pill shape */
}

.btn-form:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-icon {
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    backdrop-filter: blur(4px);
    border: 1px solid var(--border-color);
}

.btn-icon:hover {
    background: var(--secondary-bg);
    transform: rotate(15deg);
}

/* Form Link */
.form-link {
    background: linear-gradient(to right, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 3rem 2rem;
    border-radius: 24px;
    text-align: center;
    margin: 2rem 0;
    position: relative;
    overflow: hidden;
}

.form-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
}

.form-link h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.form-link p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Reports List - Glassmorphism Cards */
.report-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.report-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: var(--primary-color);
}

.report-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    background: rgba(var(--surface-color), 0.3);
    /* Slightly different bg for header */
}

.report-date {
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
}

.report-date i {
    color: var(--primary-color);
}

.report-tags {
    display: flex;
    gap: 0.5rem;
}

.tag {
    padding: 0.35rem 0.85rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.tag-headquarters {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.2));
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.tag-department {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.2));
    color: var(--primary-color);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.report-content {
    padding: 1.75rem;
}

.content-section {
    margin-bottom: 1.75rem;
}

.content-section:last-child {
    margin-bottom: 0;
}

.content-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: 0.1em;
    opacity: 0.8;
}

.content-text {
    color: var(--text-primary);
    line-height: 1.8;
    white-space: pre-wrap;
    font-weight: 400;
}

/* Status & Loading */
.loading {
    text-align: center;
    padding: 4rem;
    color: var(--primary-color);
    font-weight: 600;
    background: var(--glass-bg);
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

.no-data {
    text-align: center;
    padding: 4rem;
    color: var(--text-secondary);
    background: var(--glass-bg);
    border-radius: 16px;
    border: 1px dashed var(--border-color);
    backdrop-filter: blur(10px);
}

.error {
    background: rgba(254, 226, 226, 0.9);
    border: 1px solid #fecaca;
    color: #991b1b;
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    backdrop-filter: blur(4px);
}

[data-theme="dark"] .error {
    background: rgba(69, 10, 10, 0.9);
    border-color: #7f1d1d;
    color: #fecaca;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .filter-row {
        flex-direction: column;
        align-items: stretch;
    }

    .form-link {
        padding: 2rem 1.5rem;
    }

    .header-content h1 {
        font-size: 1.25rem;
    }

    .report-header {
        flex-direction: column;
        align-items: flex-start;
    }
}