/* ============================================
   BUTTONS — Action Button Styles
   ============================================ */

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: 14px 24px;
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ── Primary (Blue filled) ── */
.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    color: var(--text-on-primary);
    border: none;
    box-shadow: var(--shadow-glow-primary);
}

.btn--primary:hover {
    box-shadow: 0 0 30px var(--color-primary-glow), var(--shadow-md);
    transform: translateY(-1px);
}

.btn--primary::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
}

.btn--primary:hover::before {
    opacity: 1;
}

/* ── Outlined (Glass border) ── */
.btn--outlined {
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn--outlined:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-color-hover);
    transform: translateY(-1px);
}

/* ── Accent (Orange/Amber gradient) ── */
.btn--accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: var(--text-on-primary);
    border: none;
    box-shadow: var(--shadow-glow-accent);
}

.btn--accent:hover {
    box-shadow: 0 0 30px var(--color-accent-glow), var(--shadow-md);
    transform: translateY(-1px);
}

.btn--accent::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 100%);
}

.btn--accent:hover::before {
    opacity: 1;
}