/* =============================================================================
   PRIMARY BUTTON COMPONENT
   Brand: Deep Trust Blue (#0B3C5D) Background, Calm Teal (#1F8A70) Focus
   Block: .primary-button
   ============================================================================= */

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    min-height: 48px; /* WCAG touch-safe */
    background-color: var(--color-trust-blue);
    color: var(--color-white);
    border: 2px solid transparent;
    border-radius: 8px;
    font-family: 'Inter', 'Source Sans Pro', sans-serif;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    
    /* Motion bindings */
    transition: background-color var(--motion-fast), box-shadow var(--motion-fast), transform var(--motion-fast), opacity var(--motion-fast);
    
    user-select: none;
    -webkit-user-select: none;
}

.primary-button--full-width {
    width: 100%;
}

.primary-button:hover:not(:disabled):not(.primary-button--disabled) {
    background-color: var(--color-trust-blue-hover);
    box-shadow: 0px 4px 12px rgba(11, 60, 93, 0.25);
    /* No upward translation on hover per motion rules to keep it grounded */
}

/* Tactile click feedback */
.primary-button:active:not(:disabled):not(.primary-button--disabled) {
    background-color: #051A29; /* Deepest shade for active */
    box-shadow: none;
    transform: scale(0.98);
}

/* Calm Teal focus outline */
.primary-button:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-offset);
}

.primary-button:disabled,
.primary-button--disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.primary-button--loading {
    cursor: wait;
    opacity: 0.85;
}

.primary-button--loading:hover {
    background-color: var(--color-trust-blue);
    box-shadow: none;
    transform: none;
}

.primary-button__loading-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.primary-button__label {
    display: inline-block;
}

.primary-button__icon {
    font-size: 14px;
    line-height: 1;
    flex-shrink: 0;
    transition: transform var(--motion-fast);
}

.primary-button__icon--leading {
    margin-right: 4px;
}

.primary-button__icon--trailing {
    margin-left: 4px;
}

.primary-button:hover .primary-button__icon--trailing {
    transform: translateX(4px);
}

.primary-button:hover .primary-button__icon--leading {
    transform: translateX(-4px);
}

/* Inverse Variant */
.primary-button--inverse {
    background-color: var(--color-white);
    color: var(--color-trust-blue);
}

.primary-button--inverse:hover:not(:disabled):not(.primary-button--disabled) {
    background-color: var(--color-off-white);
    color: var(--color-calm-teal); /* Hover state turns Calm Teal */
    box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.1);
}

.primary-button--inverse:active:not(:disabled):not(.primary-button--disabled) {
    background-color: #E2E8F0;
    transform: scale(0.98);
}