/* ========================================
   COMPONENTS — Reusable UI components
   ======================================== */

/* ---- BUTTONS ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
    white-space: nowrap;
}

.btn--primary {
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
    background: var(--gradient-accent-hover);
    box-shadow: var(--shadow-glow-strong);
    transform: translateY(-2px);
}

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

.btn--outline:hover {
    border-color: var(--color-border-accent);
    background: rgba(0, 212, 170, 0.05);
    transform: translateY(-2px);
}

.btn--lg {
    padding: 1rem 2rem;
    font-size: var(--fs-base);
    border-radius: var(--radius-lg);
}

/* ---- NAVBAR ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
    background: transparent;
}

.navbar--scrolled {
    background: rgba(10, 14, 23, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.navbar__logo {
    display: flex;
    align-items: center;
    gap: 2px;
    z-index: var(--z-overlay);
}

.navbar__logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: var(--fw-bold);
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
}

.navbar__logo-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    margin-bottom: -4px;
}

.navbar__nav {
    display: flex;
    align-items: center;
}

.navbar__list {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.navbar__link {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.navbar__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.navbar__link:hover,
.navbar__link--active {
    color: var(--color-text-primary);
}

.navbar__link:hover::after,
.navbar__link--active::after {
    width: 100%;
}

.navbar__cta {
    font-size: var(--fs-xs);
    padding: 0.6rem 1.25rem;
}

.navbar__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    z-index: var(--z-overlay);
}

.navbar__toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

/* Hamburger active state */
.navbar__toggle--active .navbar__toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle--active .navbar__toggle-bar:nth-child(2) {
    opacity: 0;
}

.navbar__toggle--active .navbar__toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- CARDS ---- */
.card {
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.card--glass {
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
}

.card--glass:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    background: rgba(0, 212, 170, 0.08);
    color: var(--color-accent);
    border: 1px solid rgba(0, 212, 170, 0.15);
}

.card__icon--accent {
    background: rgba(0, 212, 170, 0.1);
}

.card__title {
    font-size: var(--fs-xl);
    margin-bottom: var(--space-sm);
}

.card__text {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ---- TAGS ---- */
.tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.tag:hover {
    color: var(--color-accent);
    border-color: var(--color-border-accent);
    background: rgba(0, 212, 170, 0.05);
}

/* ---- FORM ELEMENTS ---- */
.form__label {
    display: block;
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.form__input {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: var(--fs-sm);
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    appearance: none;
}

.form__input::placeholder {
    color: var(--color-text-muted);
}

.form__input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.form__input--error {
    border-color: var(--color-error);
}

.form__input--error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form__select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%239CA3AF'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__error {
    display: block;
    font-size: var(--fs-xs);
    color: var(--color-error);
    margin-top: var(--space-xs);
    min-height: 1.2em;
}

.form__group {
    margin-bottom: var(--space-lg);
    flex: 1;
}

.form__row {
    display: flex;
    gap: var(--space-lg);
}

.form__group--checkbox {
    margin-bottom: var(--space-xl);
}

.form__checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
}

.form__checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form__checkbox-custom {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-tertiary);
    transition: all var(--transition-fast);
    position: relative;
    margin-top: 2px;
}

.form__checkbox:checked + .form__checkbox-custom {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.form__checkbox:checked + .form__checkbox-custom::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 6px;
    width: 6px;
    height: 10px;
    border: solid var(--color-bg-primary);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.form__checkbox:focus-visible + .form__checkbox-custom {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.form__link {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.form__link:hover {
    color: var(--color-accent-hover);
}

.form__submit {
    width: 100%;
    justify-content: center;
}

.form__submit-loading {
    display: none;
}

.form__submit--loading .form__submit-text {
    display: none;
}

.form__submit--loading .form__submit-loading {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.form__message {
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    text-align: center;
    display: none;
}

.form__message--success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
}

.form__message--error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-error);
}