:root {
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --background-color: #f4f7f6;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-secondary-color: #777777;
    --error-color: #d0021b;
    --font-family: 'Noto Sans KR', sans-serif;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    /* Theming additions */
    --border-color: #e5e7eb;
    --input-border-color: #cccccc;
    --placeholder-color: #cccccc;
    --btn-hover-color: #357abd;
    --btn-secondary-hover-color: #555555;
    --add-card-hover-bg: #eaf3fe;
    --add-card-hover-text: #357abd;
    --appclip-hover-bg: #3dbaa2;
    --focus-bg-color: rgba(0, 0, 0, 0.02);
}

:root[data-theme='dark'] {
    --background-color: #0d1117;
    --surface-color: #161b22;
    --text-color: #e6edf3;
    --text-secondary-color: #9aa4b2;
    --border-color: #2d333b;
    --input-border-color: #3b434b;
    --placeholder-color: #7a828a;
    --btn-hover-color: #3a7ecb;
    --btn-secondary-hover-color: #666666;
    --add-card-hover-bg: rgba(56, 139, 253, 0.15);
    --add-card-hover-text: #58a6ff;
    --appclip-hover-bg: #2fa98f;
    --focus-bg-color: rgba(255, 255, 255, 0.03);
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Login Page */
.login-box {
    max-width: 400px;
    margin: 5rem auto;
    padding: 2.5rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.login-box h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-box .subtitle {
    color: var(--text-secondary-color);
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.input-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--input-border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    box-sizing: border-box;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.btn {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.btn.btn-secondary {
    background-color: var(--text-secondary-color);
}
.btn.btn-secondary:hover {
    background-color: var(--btn-secondary-hover-color);
}


.error-message {
    color: var(--error-color);
    margin-top: 1rem;
    min-height: 1.2em;
}

.signup-link {
    margin-top: 1.5rem;
    color: var(--text-secondary-color);
}

.signup-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
}

/* Dashboard Page */
header {
    background-color: var(--surface-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

header h1 {
    margin: 0;
    color: var(--primary-color);
}

.header-logo {
    text-decoration: none;
}

header #logout-btn {
    width: auto;
    padding: 0.5rem 1rem;
    font-size: 1rem;
}

.dashboard {
    padding-top: 2rem;
}

#loading {
    text-align: center;
    padding: 4rem;
    color: var(--text-secondary-color);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2, .card h3, .card h4 {
    margin-top: 0;
    color: var(--primary-color);
}

.section-title {
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}


.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.add-stage-card {
    border: 2px dashed var(--primary-color);
    background-color: transparent;
    color: var(--primary-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 150px;
}

.add-stage-card:hover {
    background-color: var(--add-card-hover-bg);
    color: var(--add-card-hover-text);
}

.add-stage-card span {
    font-size: 3rem;
    font-weight: bold;
    line-height: 1;
}

.add-stage-card p {
    margin: 0.5rem 0 0 0;
    font-weight: bold;
}

.editable-description {
    width: 100%;
    border: 1px solid transparent;
    background-color: transparent;
    resize: none;
    outline: none;
    font-family: inherit;
    font-size: 1em;
    color: var(--text-secondary-color);
    padding: 4px;
    margin: -4px 0 8px -4px;
    border-radius: var(--border-radius);
    overflow-y: hidden;
    line-height: 1.6;
    transition: all 0.3s ease;
}

.editable-description::placeholder {
    color: var(--placeholder-color);
}

.editable-description:focus {
    border-color: var(--input-border-color);
    background-color: var(--focus-bg-color);
    color: var(--text-color);
}

.appclip-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.appclip-link:hover {
    background-color: var(--appclip-hover-bg);
}

.pills-container {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.pill {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
}

.pill.basic {
    background-color: #eaf3fe;
    color: #4a90e2;
    border: 1px solid #4a90e2;
}

.pill.custom {
    background-color: #eef9f7;
    color: #3dbaa2;
    border: 1px solid #3dbaa2;
}


@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .login-box {
        margin-top: 2rem;
        padding: 1.5rem;
    }

    header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }
}

/* Data Table (shared) */
.data-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}
.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.data-table th {
    background-color: var(--background-color);
    font-weight: bold;
    color: var(--primary-color);
}
.data-table td a {
    color: var(--primary-color);
    text-decoration: none;
    word-break: break-all;
}
.data-table td a:hover {
    text-decoration: underline;
}
@media (max-width: 768px) {
    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }
}