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

/* ==== FORM ELEMENTS ==== */

input,
select,
textarea {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--color-text-tertiary);
    border-radius: 2px;
    background-color: var(--color-background-primary);
    color: var(--color-text-primary);
    padding: 0.4rem 0.6rem;
    font-size: 0.95rem;
    line-height: 1.3;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--color-highlight-primary);
    outline: none;
    background-color: var(--color-background-secondary);
}

/* Placeholder color */
input::placeholder,
textarea::placeholder {
    color: var(--color-text-tertiary);
}

/* Labels */
label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
    color: var(--color-text-secondary);
}

/* Form layout helpers */
.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.form-col {
    flex: 1;
    min-width: 200px;
}

/* ==== BUTTONS ==== */

button, .btn{
    border: none;
    border-radius: 2px;
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.1s ease;
}

button:active, .btn:active {
    transform: scale(0.97);
}

button:disabled, .btn:disabled {
    background-color: var(--color-button-disabled-bg);
    color: var(--color-button-disabled-text);
    cursor: not-allowed;
    opacity: 0.6;
}

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

.btn-success {
    background-color: var(--color-button-success-bg);
    color: var(--color-button-success-text);
}
.btn-success:hover {
    background-color: var(--color-button-success-hover-bg);
}

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

.btn-danger {
    background-color: var(--color-button-danger-bg);
    color: var(--color-button-danger-text);
}
.btn-danger:hover {
    background-color: var(--color-button-danger-hover-bg);
}

/* ==== CARD / PANEL ==== */

.card,
.panel {
    background-color: var(--color-background-primary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-text-tertiary);
    border-radius: 4px;
    padding: 1rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: background-color 0.2s ease, transform 0.15s ease;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--color-highlight-primary);
}

/* ==== SCROLLABLE LIST ==== */

.scrollable {
    max-height: 400px;
    overflow-y: auto;
    position: relative;
    padding-right: 0.5rem;
}

/* fade effect */
.scrollable::after {
    content: "";
    position: sticky;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40px;
    pointer-events: none;
    background: linear-gradient(
            to bottom,
            rgba(0, 0, 0, 0),
            var(--color-background-primary)
    );
}

/* scrollbar styling */
.scrollable::-webkit-scrollbar {
    width: 8px;
}

.scrollable::-webkit-scrollbar-thumb {
    background-color: var(--color-text-tertiary);
    border-radius: 4px;
}

.scrollable::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-highlight-secondary);
}

/* ==== TYPOGRAPHY & CONTAINERS ==== */

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-primary);
    font-weight: 600;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
}

/* ==== BODY ==== */
body {
    background-color: var(--color-background-primary);
    color: var(--color-text-primary);
    margin: 0;
    padding: 0;
}