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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --danger-color: #dc2626;
    --success-color: #16a34a;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
}

@media (max-width: 968px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

section {
    background: var(--bg-white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

/* Buttons */
button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

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

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

.btn-secondary:hover {
    background-color: #475569;
}

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

.btn-danger:hover {
    background-color: #b91c1c;
}

/* Progress Section */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.controls {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.controls select {
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.progress-sheets {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 3rem;
    font-style: italic;
}

/* Student Sheet */
.student-sheet {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    background: var(--bg-white);
    page-break-inside: avoid;
}

.student-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.student-name-block {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    min-width: 0;
    width: 100%;
}

.student-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.student-name-input {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    max-width: 100%;
    width: 100%;
    font-family: inherit;
    line-height: 1.3;
    box-sizing: border-box;
}

.student-name-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.observation-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.observations-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.observation-item {
    padding: 1rem;
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
}

.observation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.observation-type {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: capitalize;
}

.observation-type.academic {
    background-color: #dbeafe;
    color: #1e40af;
}

.observation-type.behavior {
    background-color: #fef3c7;
    color: #92400e;
}

.observation-type.participation {
    background-color: #d1fae5;
    color: #065f46;
}

.observation-type.social {
    background-color: #e9d5ff;
    color: #6b21a8;
}

.observation-type.strength {
    background-color: #fce7f3;
    color: #9f1239;
}

.observation-type.concern {
    background-color: #fee2e2;
    color: #991b1b;
}

.observation-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.observation-notes {
    color: var(--text-primary);
    line-height: 1.6;
}

.observation-notes-input {
    color: var(--text-primary);
    line-height: 1.6;
    width: 100%;
    margin-top: 0.5rem;
    box-sizing: border-box;
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font: inherit;
    resize: vertical;
    min-height: 4.5em;
}

.observation-notes-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-compact {
    padding: 0.35rem 0.9rem;
    font-size: 0.88rem;
}

.observation-item-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.summary-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
}

.summary-title {
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 0.75rem;
    background: var(--bg-light);
    border-radius: 6px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    header {
        margin-bottom: 1rem;
        padding-bottom: 1rem;
    }

    .input-section,
    .section-header .controls,
    #student-filter,
    #print-btn,
    #clear-btn {
        display: none;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    section {
        box-shadow: none;
        padding: 1rem;
    }

    .student-sheet {
        page-break-after: always;
        border: 1px solid #ccc;
    }

    .student-sheet:last-child {
        page-break-after: auto;
    }

    .observation-item {
        page-break-inside: avoid;
    }

    .sheet-action {
        display: none;
    }

    .student-name-input {
        border: none;
        padding: 0;
        box-shadow: none;
    }

    .observation-notes-input {
        border: none;
        padding: 0.25rem 0 0 0;
        min-height: 0;
        overflow: visible;
    }
}